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hi all,
yesterday i got an aftermarket, all purpose usb charger that could charge my iphone, my htc, my zune and my bluetooth GPS device (easier to carry one charger for all)
i put my htc on charge overnight, the way i usually do, but when i checked it in the morning, the screen was not responding to touch. the screen was fine and i could do the navigation thru keyboard, just no response on touch...
the screen wasn't burnt or damaged in anyway from any side, neither was the device hot.....
my charger specs are 5v / 1.5 amp output....
i suspected a software issue, and hard-resetted as well, but no use!
any idea if the charger (amp rating) could be responsible for the damage?
thanks,
Farrukh
http://bytesizer.blogspot.com
Same problem i'm facing . . . . .
Is there any solution to it ?
i had the same problem a couple day ago, sounds funny but
i've put it i portrait mode and just hit my left hand with my uni and it started working again,
btw check is there any dirt on the edges of the screen, try cleaning it
or go to align screen and tap every point of the screen to see if the cross moves
It is an interesting problem in a sense that it is sudden. Usually digitizer failures and loss of touch sensitivity happens over a period of time. The only time it can happen suddenly and completely is when the digitizer gets ripped off at the connector or comes loose over time. Doubt the charger was responsible. You have an intermittent (or permanent) digitizer failure. Try re-flashing ROM to exclude software corruption issue. If all fails - replace the LCD+Digitizer.
IN CASE EVERYTHING ELSE FAILS. I know it sounds extravagant to replace both, but unless you have a specialised equipment and/or are capable of flex soldering, I suggest purchasing both in one unit. Can either go new, in which case I suggest cnn.cn as one of the cheapest sources for Dopod D900 (which is the model you will be searching for on that site, no others will be available) LCD+Digitizer combos or... purchase a cheap failed second hand unit with good screen.
The replacement is a fairly straightforward job if you are capable of following the instructions precisely. The instructions can be found in a Service Manual floating somewhere on this site.
Well, this isn't the best place to ask, but I'm not sure where else to do so. Somehow I managed to drop my phone (onto a carpeted floor from not quite a full standing height, not concrete or anything) and it landed right on the bottom I think. I can't see any signs of damage anywhere at all -- I even pulled out the screws and looked at the PCB itself and I just can't see anything obvious at all. Unfortunately, something obviously is wrong all the same. It simply will not charge at all most of the time, though seemingly randomly on a whim when I connect it sometimes it will. I'm afraid even to touch it once it finally does as just moving the cable around seems to be enough to make it stop sometimes (whereas at some other times I can move it around a lot and everything and it still stays connected.) Last night it decided not to even charge even though the LED indicator and the icon showed that it was connected. What's more, I can no longer use the USB OTG capability to plug in USB drives, other devices, and etc (which I used for diagnostics, repairs, and etc of other things on the go.) I have multiple batteries and external chargers, so this isn't completely fatal but it means:
A. I can't keep it from running the batteries down in the first place (which means larger wear and tear on the batteries long-term since they are discharged further before charging.)
B. Since it's like this it means generally speaking it's not as ready for a fully day of use since it's starting the day with less than 100% charge before I even leave for work every time now.
C. I really did use the USB OTG feature and have already been missing it. It's not as fatal as devices like my Nexus 7 (since that lacks a MicroSDHC card reader to supplement its internal storage whereas this has one) but very annoying at least.
D. I really really miss being able to use a phone dock! I was docking it in my car to keep it at least semi-charged and to output a line output to my car stereo system. It's kind of a pain having to change the volume back and forth between headphones and line output (since a line output really needs the full volume) and obviously it uses more power while playing than just sitting quietly in a pocket anyway. I also liked the way in the dock it wouldn't completely shut off the screen, just go into a really low power mode where it had a faded clock (might be a CM10.1 feature, but nice wherever it came from) and I could just touch it to get back to the player controls.
At first I thought it was just loose, so I tried putting a very thin piece of plastic in the top part of the connector so the connection is extremely tight which fooled me at first by pretending to work really well for a while, but then after a while it just did the same stuff all over again (so it was just doing that thing where it works fine for a little while even when I move the cord around.) I just can't see what could possibly be the problem though because if there is any damage anywhere I'm just not seeing it. I really don't see how the connector could have been damaged anyway since it more or less landed straight on the middle of the bottom (and that ring that goes around the side should have absorbed the shock) but with no cracks on the PCB or anything that I can at all see I can't imagine what else it might be -- plus a few times when it decided to charge it was just sitting flat not being touched and suddenly started working randomly. It really is like it just works on a whim here...
So I'm wondering: just how screwed am I here? I don't have any sort of drop insurance -- I've never dropped a phone in a way that damaged it before -- and I don't think there's any way I could afford the ridiculous amounts they'd surely want for a repair (not to mention that for a while I'd have no phone at all if I did that...) I thought about changing out the connector myself (I see one on Amazon for $8 which is ridiculous, but obviously it has to be the exact same connector) but I'm not terribly confident about desoldering and resoldering something with such small connectors as it is and that one is hard to get to anyway. Besides which, I'm not convinced it is the connector even if I can't see what else it could possibly be. What could possibly be causing it to be quite so random about this? Is there any way at all I can fix this myself, or is this something where the only way of ever getting it fixed would be to take it in for repair at extreme cost (and no phone for a while too)? Anyone have any idea what it might cost for such a repair?
Well I'm sure you noticed the metal charging usb port that is connected to the circuit board.
It sounds to me that it may have broke free a little bit and not making a solid connection.
First thing I would do is try some one else's charger and see if it works ( Just in case)
Then If that failed I would take apart the phone and inspect the connector.
Ten screws on the back plastic and one little black one on the circuit board.
Next you pop off the ribbon connectors and finally pop off the wire connector that runs along the right side of your phone when laying face down,
Double check all connectors and remove circuit board carefully.
Now you will be free to inspect connector
For all you know. Pushing it down with some pressure on the thumb may give you the connection you need again and you should be good to go.
But you really need to see what's broken before you go to fix it.
Good luck. Pm me if you need further help
Well, like I said, I opened it up and I just can't find any signs of damage to the connector or the board. Also, if you look at the SGS3, the connector is actually inside the casing somewhat, so really I don't see how it could have bee damaged anyway -- I'm just not sure what else it could be since, as I said, I also couldn't find any cracks in the PCB or anything.
Oh, and I've used four different chargers and at least three different cables. One charger and cable is the OEM set for the SGS3 and another is the OEM set for the Nexus 7 (which is probably a decent amount more more power hungry.)
Nazo said:
Well, this isn't the best place to ask, but I'm not sure where else to do so. Somehow I managed to drop my phone (onto a carpeted floor from not quite a full standing height, not concrete or anything) and it landed right on the bottom I think. I can't see any signs of damage anywhere at all -- I even pulled out the screws and looked at the PCB itself and I just can't see anything obvious at all. Unfortunately, something obviously is wrong all the same. It simply will not charge at all most of the time, though seemingly randomly on a whim when I connect it sometimes it will. I'm afraid even to touch it once it finally does as just moving the cable around seems to be enough to make it stop sometimes (whereas at some other times I can move it around a lot and everything and it still stays connected.) Last night it decided not to even charge even though the LED indicator and the icon showed that it was connected. What's more, I can no longer use the USB OTG capability to plug in USB drives, other devices, and etc (which I used for diagnostics, repairs, and etc of other things on the go.) I have multiple batteries and external chargers, so this isn't completely fatal but it means:
A. I can't keep it from running the batteries down in the first place (which means larger wear and tear on the batteries long-term since they are discharged further before charging.)
B. Since it's like this it means generally speaking it's not as ready for a fully day of use since it's starting the day with less than 100% charge before I even leave for work every time now.
C. I really did use the USB OTG feature and have already been missing it. It's not as fatal as devices like my Nexus 7 (since that lacks a MicroSDHC card reader to supplement its internal storage whereas this has one) but very annoying at least.
D. I really really miss being able to use a phone dock! I was docking it in my car to keep it at least semi-charged and to output a line output to my car stereo system. It's kind of a pain having to change the volume back and forth between headphones and line output (since a line output really needs the full volume) and obviously it uses more power while playing than just sitting quietly in a pocket anyway. I also liked the way in the dock it wouldn't completely shut off the screen, just go into a really low power mode where it had a faded clock (might be a CM10.1 feature, but nice wherever it came from) and I could just touch it to get back to the player controls.
At first I thought it was just loose, so I tried putting a very thin piece of plastic in the top part of the connector so the connection is extremely tight which fooled me at first by pretending to work really well for a while, but then after a while it just did the same stuff all over again (so it was just doing that thing where it works fine for a little while even when I move the cord around.) I just can't see what could possibly be the problem though because if there is any damage anywhere I'm just not seeing it. I really don't see how the connector could have been damaged anyway since it more or less landed straight on the middle of the bottom (and that ring that goes around the side should have absorbed the shock) but with no cracks on the PCB or anything that I can at all see I can't imagine what else it might be -- plus a few times when it decided to charge it was just sitting flat not being touched and suddenly started working randomly. It really is like it just works on a whim here...
So I'm wondering: just how screwed am I here? I don't have any sort of drop insurance -- I've never dropped a phone in a way that damaged it before -- and I don't think there's any way I could afford the ridiculous amounts they'd surely want for a repair (not to mention that for a while I'd have no phone at all if I did that...) I thought about changing out the connector myself (I see one on Amazon for $8 which is ridiculous, but obviously it has to be the exact same connector) but I'm not terribly confident about desoldering and resoldering something with such small connectors as it is and that one is hard to get to anyway. Besides which, I'm not convinced it is the connector even if I can't see what else it could possibly be. What could possibly be causing it to be quite so random about this? Is there any way at all I can fix this myself, or is this something where the only way of ever getting it fixed would be to take it in for repair at extreme cost (and no phone for a while too)? Anyone have any idea what it might cost for such a repair?
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Click to collapse
You might as well try it yourself THEN go somewhere if it doesn't work out. I wouldn't think if things go horribly wrong that you'd do damage that isn't reversible, and if there was damage it would likely be just to that $8 piece.
You sound like a knowledgeable guy though, so I'd give it a shot.
Sent from my SCH-I535 using xda app-developers app
The thing is, I don't really want to spend the $8 (I'm getting pretty broke) and have to try to desolder then resolder those tiny contacts on a board I'm not even entirely sure how to safely get out possibly messing something else up along the way when I'm not convinced it is the connector (and obviously if I messed something else up along the way I could make things a lot worse -- for instance, breaking it entirely...) Things that should make it work if it were (jiggling and shaking it for instance) don't seem to and then some things that should work don't (for example, last night I disconnected the phone from one charger and connected it to another while it was at least pretending to work and it stopped even though the connector part didn't get moved at all.)
That's my real concern in the end. If it's not the connector, what is it? I'm not 100% confident about trying to replace it myself as it is, but if it's not that the time, money, and effort would be wasted...
Well that's that. The problem, as I feared, was more fundamental (which is part of what I was asking here.) I plugged in something last night and it just shut off. I checked all over and couldn't find shorts or anything to explain it. Even after leaving the battery out overnight it still won't come on. Clearly the problem was much more fundamental than it seemed. Regardless, the question of the connector is moot now. EDIT: It might have been caused by the connector after all. It seems like there are pins at the back that either are loose or were knocked loose by the fall. I THINK one of them was touching another causing a short. Unfortunately, it's too late to discover that now as either way the damage is already done and it no longer works even after I got them straightened out.
I have a TF101 that will not charge or power on. I rooted it a month ago and it was running great. My wife lost the charger and had plugged in the tablet USB cable to a cell-phone charger , I found plugged into a week later to the phone charger, unplugged and attempted to turn that tablet on, it flickered on for a moment and then died (loading screen) :silly: ya stupid right?. I them found the right charger and plugged in the tablet and the light indicating that it is charging does not come on. I look and looked online for help. I'm pretty sure its not a charging problem as I did the freezer trip on the charger box nothing, I bought a new charging cable and charger off Amazon, nothing. Still not coming on when plugged in or anything (That is why I don't think its just a battery issue from what I have read.) The connection on the tablet looks ok on the bottom and both the old and new charger will power up and charge the keyboard dock just fine. Has the tablet been bricked dead?? Nothing I can do??
Thanks for your help and reply on this your all awesome
P.S I also tried a slow charge through the usb port on my computer over night and left the tablet plugged into both chargers over the course of two different nights. No luck.Also can't get into (Apx mode) the volume up and power held down for 15 sec does nothing.
Looks like you're stuck. You'll have to make a decision whether to buy a new battery or not. A colleague of mine solved a similar issue with a new battery off ebay, but it doesn't mean there isn't another hardware issue.
When you say the charging light does not come on, you mean on the dock right? The tablet itself doesn't have one. Did you try to just charge the tablet without the dock? Did you try to open the dock and flip the switch?
Lethe6 said:
Looks like you're stuck. You'll have to make a decision whether to buy a new battery or not. A colleague of mine solved a similar issue with a new battery off ebay, but it doesn't mean there isn't another hardware issue.
When you say the charging light does not come on, you mean on the dock right? The tablet itself doesn't have one. Did you try to just charge the tablet without the dock? Did you try to open the dock and flip the switch?
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Click to collapse
Yes the charging light on the dock does come on I thought I saw what looked like a light on the tablet. So the dock is charging and working just fine.
A battery like this? (I would put the URL but its not letting me since I'm new.
I'm not super good would opening stuff up how hard would the battery be to replace? I did see a thread on opening the unit itself looked complex. Also Any more trouble shooting I should do? I may just buy a replacement off ebay and sale my old one. Also can you tell me if its bricked or not or whatnot? I just don't want to put out fifty bucks for a battery and not have it work
Well if it won't turn on, it's difficult to troubleshoot further. The general rule is: As long as you can get it in APX mode, it's not bricked; with hardware issues as the only exception. In theory, it should power on with an empty battery (and start the charging process), but I have no idea about a dead battery or how the unit is made to handle such cases. Give it some time I'm sure someone else here can answer that question from experience.
Replacing the tablet battery is not too hard, but it's a long task that requires patience and some tools. There's some videos on youtube and others about how to open the unit safely without damage, and decent tools are cheap assuming you don't have precision tools. By opening it you can troubleshoot it a little more. Inspect the battery for physical damage, like being oversized, which means it's likely dead. If it looks in good shape, try disconnecting and reconnecting it to the board; sometimes reseating a connector solves the issues. Also look for any obvious damage inside while you're there. Even if you don't know much about electronics, an obvious burn mark on the board is never a good sign.
If after all that it still won't power on, then yes you could check out ebay. Just make sure lots of people have bought the same from this buyer (the more the better) and they gave positive reviews for the product (stuff like "still works after a year"). Make sure it specifies it supports the tf101 and it should be fine.
Honestly from what you described in the original thread, I wouldn't be surprised if over-amp or something like that damaged the battery. Hopefully it's only the battery but as I explained, it's rather hard to troubleshoot. From personal experience developing boards like that, there are usually protections in the device to prevent damage in case of over/reverse voltage/amp. Depending where the battery is connected in the circuit sometimes it's protected sometimes it's not. I have no idea how Asus do it so take it with a grain of salt.
Can you provide said phone-charger specs? Volts/amps/exact model?
Edit: P.S. The device or dock will not charge through USB. You need the actual wall charger.
Lethe6 said:
Well if it won't turn on, it's difficult to troubleshoot further. The general rule is: As long as you can get it in APX mode, it's not bricked; with hardware issues as the only exception. In theory, it should power on with an empty battery (and start the charging process), but I have no idea about a dead battery or how the unit is made to handle such cases. Give it some time I'm sure someone else here can answer that question from experience.
Replacing the tablet battery is not too hard, but it's a long task that requires patience and some tools. There's some videos on youtube and others about how to open the unit safely without damage, and decent tools are cheap assuming you don't have precision tools. By opening it you can troubleshoot it a little more. Inspect the battery for physical damage, like being oversized, which means it's likely dead. If it looks in good shape, try disconnecting and reconnecting it to the board; sometimes reseating a connector solves the issues. Also look for any obvious damage inside while you're there. Even if you don't know much about electronics, an obvious burn mark on the board is never a good sign.
If after all that it still won't power on, then yes you could check out ebay. Just make sure lots of people have bought the same from this buyer (the more the better) and they gave positive reviews for the product (stuff like "still works after a year"). Make sure it specifies it supports the tf101 and it should be fine.
Honestly from what you described in the original thread, I wouldn't be surprised if over-amp or something like that damaged the battery. Hopefully it's only the battery but as I explained, it's rather hard to troubleshoot. From personal experience developing boards like that, there are usually protections in the device to prevent damage in case of over/reverse voltage/amp. Depending where the battery is connected in the circuit sometimes it's protected sometimes it's not. I have no idea how Asus do it so take it with a grain of salt.
Can you provide said phone-charger specs? Volts/amps/exact model?
Edit: P.S. The device or dock will not charge through USB. You need the actual wall charger.
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Click to collapse
The phone charger that it was plugged into was a Galaxy S charger. 5v===0.7A. Doesn't seem high enough to have done anything...but I'm definitely no expert. (Literally)
Sounds like its a good idea to open it up then to check on the battery, if burned or oversized then I will buy a new one (As long as I don't see burnt marks) If the battery looks fine I'll try the reconnect. And cross hy fingers. Thanks for all your help so far. Any advice on where to buy the tools? Deal Extreme good for that Amazon?
No tools are required, ands its easy to get into just be carefull pulling the bezel off as the tabs that hold it on are quite weak (i broke a couple when i ripped mine apart in anger lol) after that their is about 10 normal screws until its open. It could be the case that the battery just needs to be unplugged and re-plugged in.
Its a strange problem you have there, the power output from that charger is less than half of what the standard asus charger outputs, if something is fried id call concidence as ive plugged my tf101 into various ac-usb adaptors with no troubles. Its a complete guess at this point but its almost like your tablet is suffering from the 0% issue thats common in the docks, where it refuses to charge if completely drained (afaik with the dock this is fixed by disconnecting and reconnecting the battery)
Also did you get an official asus charger as a replacement? a few of the cheaper ones dont even output enough voltage to fast charge the tf101.
So, my Z3 has this very annoying problem of rebooting when shaked. When I shake the phone I can feel a part moving, quite a hefty one, it feels like a battery and it moves quite a bit. This is problematic since the phone tends to shake in my pocket which causes 'random' reboots and failed PIN attempts.
Is this common? How can I fix this?
Your guess is correct.
I did disassembly one to check the gps connections and my unit the battery is not glued or taped to the chassis... so it could happen that it shakes, after shaking the connector can move quite easily, the other thing could be a damaged ribbon connector.
Every time when I charging use cable, I can feel the small vibration on side of phone when touch it.. especially on top of phone .. Does everyone got this issue
Sent from my [device_name] using XDA-Developers Legacy app
I'm not seeing this on my N20 Ultra.
What happens if you use another charging cable and power brick and or wireless charging.
Is it a vibration or electric current?
Probably a coil in the phone's power converter.
Switching transformer or such.
It happened sometimes for me too with almost any phone, and it was more likely to happen with metal ones. Usually it goes away after a bit.
The same with laptop that got a metal casing too.
Wouldn't have thought you could feel 11v max
Sorry guys but you wouldn't feel that low voltage even if it was 20V
You wouldn't feel it
Maybe your fingers/palm vibrate when you slide along the metallic bits of the phone making it feel like voltage
Umm... people have been severely shocked by car batteries.
One kid decades ago it was reported killed himself with a 9V battery.
It all depends on the resistance in the circuit. Most times 14 volts won't be felt but when it is it's a shock.
Don't handle battery terminals with wet hands including sweat.
In this case I think it's a physical vibration.
Some people have much more sensitive levels of physical perception. Tesla was said to have extremely acute senses... and he was not stranger to shocks.
blackhawk said:
Umm... people have been severely shocked by car batteries.
One kid decades ago it was reported killed himself with a 9V battery.
It all depends on the resistance in the circuit. Most times 14 volts won't be felt but when it is it's a shock.
Don't handle battery terminals with wet hands including sweat.
In this case I think it's a physical vibration.
Some people have much more sensitive levels of physical perception. Tesla was said to have extremely acute senses... and he was not stranger to shocks.
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Click to collapse
The 9v battery thing was 'apparently' if true, because he pierced his skin with the probes allowing the blood to become the conductor passing through his heart (Although I find the story a bit far fetched, the theory is true, not sure about the story), a finger covered in skin touching the edge of a phone is not going to be felt / give a shock coming from a phone charger, stick it on your tongue maybe but not your skin, not enough voltage to make it through your skin in a phone charger
Car battery won't shock you either, touched both terminals many times using jump leads, HT leads / spark-plugs on the other hand give quite a nasty shock if you are also touching the chassis, in the rain
*Detection* said:
Wouldn't have thought you could feel 11v max
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Click to collapse
*Detection* said:
The 9v battery thing was 'apparently' if true, because he pierced his skin with the probes allowing the blood to become the conductor passing through his heart (Although I find the story a bit far fetched, the theory is true, not sure about the story), a finger covered in skin touching the edge of a phone is not going to be felt / give a shock coming from a phone charger, stick it on your tongue maybe but not your skin, not enough voltage to make it through your skin in a phone charger
Car battery won't shock you either, touched both terminals many times using jump leads, HT leads / spark-plugs on the other hand give quite a nasty shock if you are also touching the chassis, in the rain
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I first read the 9V battery story 40, 50 years ago in print. It's certainly possible... but last time I tried tracking it down found nothing conclusive. However massive as the internet db is, much info is missing.
As for car batteries I can verify from first hand experience they can give you a shock:silly:
Don't ground yourself out...
My 12KV 30 ma neon sign transformer though can give a nasty shock if your careless enough to touch one terminal.
Even along a plastic screwdriver handle if any sweat is on it. It will ground you out through the air or a hardwood floor... fun times
blackhawk said:
I first read the 9V battery story 40, 50 years ago in print. It's certainly possible... but last time I tried tracking it down found nothing conclusive. However massive as the internet db is, much info is missing.
As for car batteries I can verify from first hand experience they can give you a shock:silly:
Don't ground yourself out...
My 12KV 30 ma neon sign transformer though can give a nasty shock if your careless enough to touch one terminal.
Even along a plastic screwdriver handle if any sweat is on it. It will ground you out through the air or a hardwood floor... fun times
Click to expand...
Click to collapse
Had many nasty shocks, the power circuit board from an original Playstation, touched the back of the board where the capacitor pins were, that really hurt badly, and strangely I managed to do the exact same thing again about 5 minutes later lol
Also learned that turning off a lightswitch does not cut power to the light fitting the hard way too
*Detection* said:
Had many nasty shocks, the power circuit board from an original Playstation, touched the back of the board where the capacitor pins were, that really hurt badly, and strangely I managed to do the exact same thing again about 5 minutes later lol
Also learned that turning off a lightswitch does not cut power to the light fitting the hard way too
Click to expand...
Click to collapse
It's always quite a surprise...
One of the scariest shocks I got was from a 30" CRT I was replacing.
Basically a giant HV vacuum capacitor.
They can hold a charge a very long time, even can collect a charge sitting there from static electricity and they have "memory"; simply discharging it once isn't enough as they will build back a charge. Even though I had shorted it out for over a minute, when working to put it in, I knocked the lead off. In less then a minute it built up enough voltage to tag me... and of course it did.
The shock wasn't that bad, the real danger was dropping the CRT and it imploding. There's no protection on the back to keep the glass shards from flying out at high velocities. Techs have been killed like this.
I kept my grip... and successfully repaired it.
blackhawk said:
It's always quite a surprise...
One of the scariest shocks I got was from a 30" CRT I was replacing.
Basically a giant HV vacuum capacitor.
They can hold a charge a very long time, even can collect a charge sitting there from static electricity and they have "memory"; simply discharging it once isn't enough as they will build back a charge. Even though I had shorted it out for over a minute, when working to put it in, I knocked the lead off. In less then a minute it built up enough voltage to tag me... and of course it did.
The shock wasn't that bad, the real danger was dropping the CRT and it imploding. There's no protection on the back to keep the glass shards from flying out at high velocities. Techs have been killed like this.
I kept my grip... and successfully repaired it.
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Click to collapse
haha yea, I was very inquisitive as a kid about all things electrical, my bedroom floor was covered in PCBs and chips and wires, (surprised I'm still here to tell the tale tbh) but CRT TVs were the one thing I didn't play around with too much, they just looked like certain death to me, those thick high voltage cables and suckers were far too intimidating at that age (says the guy who did the 9v battery on the tongue trick with a mains cable plugged into a 240v socket and switched on, luckily the reason whatever device wasn't working was because the live wire had come loose from the back of the socket... can't even imagine what my mouth would have looked like if it had not...)
*Detection* said:
Had many nasty shocks, the power circuit board from an original Playstation, touched the back of the board where the capacitor pins were, that really hurt badly, and strangely I managed to do the exact same thing again about 5 minutes later lol
Also learned that turning off a lightswitch does not cut power to the light fitting the hard way too
Click to expand...
Click to collapse
*Detection* said:
haha yea, I was very inquisitive as a kid about all things electrical, my bedroom floor was covered in PCBs and chips and wires, (surprised I'm still here to tell the tale tbh) but CRT TVs were the one thing I didn't play around with too much, they just looked like certain death to me, those thick high voltage cables and suckers were far too intimidating at that age (says the guy who did the 9v battery on the tongue trick with a mains cable plugged into a 240v socket and switched on, luckily the reason whatever device wasn't working was because the live wire had come loose from the back of the socket... can't even imagine what my mouth would have looked like if it had not...)
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Click to collapse
Bah-ha-ha-ha when I was around 10 yo I stuck my index finger across the 120VAC plug prongs while they were making contact to see what it felt like... once.
The old huge plugin disposable magnesium wire flash bulbs.. once set one off in my hand with a battery. Surprise, they really get bright and... hot.
Mild first degree burns, nothing much but for the first few seconds were priceless.
kenloon2004 said:
Every time when I charging use cable, I can feel the small vibration on side of phone when touch it.. especially on top of phone .. Does everyone got this issue
Sent from my [device_name] using XDA-Developers Legacy app
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Click to collapse
I saw people mention this for other phones and for wireless charging. To some extent I think your right about "leaking electricity" but in a different way. I think the high power thats going into your phone is causing some electronics to jump to your speakers. I could be wrong, especially if the internal speakers dont use copper coils. But if they do, its very possible.
Shadow Assassin said:
I saw people mention this for other phones and for wireless charging. To some extent I think your right about "leaking electricity" but in a different way. I think the high power thats going into your phone is causing some electronics to jump to your speakers. I could be wrong, especially if the internal speakers dont use copper coils. But if they do, its very possible.
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Click to collapse
Pretty sure all the internal speakers are piezo.
It's quite possible though with wireless charging they are feeling the internal pickup coil vibrating or with wired, the power converter's choke coil(s) vibrating.
Coursing with raw power...
People really scrutinize their devices far too closely... have pity on their better halves
blackhawk said:
It's always quite a surprise...
One of the scariest shocks I got was from a 30" CRT I was replacing.
Basically a giant HV vacuum capacitor.
They can hold a charge a very long time, even can collect a charge sitting there from static electricity and they have "memory"; simply discharging it once isn't enough as they will build back a charge. Even though I had shorted it out for over a minute, when working to put it in, I knocked the lead off. In less then a minute it built up enough voltage to tag me... and of course it did.
The shock wasn't that bad, the real danger was dropping the CRT and it imploding. There's no protection on the back to keep the glass shards from flying out at high velocities. Techs have been killed like this.
I kept my grip... and successfully repaired it.
Click to expand...
Click to collapse
Been there, done that... worked in Diagnostic Imaging Field Service for 30+ years - hang on to that baby, the charge will dissipate!!! The alternative, like you said, could be a "glassy" death!