Hi friends
I am having an handset(Tilt) with flex cable problem, but wondering if flex cable can solve my phones problem where it is doing the following:
-Not accepting the SIM.
-phone is getting hanged any times, speed is also very pathetic.
-keypad is pressed on its own.
-Phone is not accepting any charger but charging with PC USB.
These are some of the major problems, I wish if someone could help me out in knowing what work does a flex cable plays, coz the technician is charging so much to change the flex cable & giving me no assurance as to what problems will be solved. I would like to know from some of those technicians here who knows something about hardware. Mike I am talking about you specially.
I would like to write this in our XDA encyclopedia given the case I get proper knowledge about it.
Looking forward to answers.
This is quite difficult to answer without testing. The SIM not being recognised will in itself slow down the phone or even create a full blown crash.
It's not stated what flex cable we are talking about. Flex Cables are just multi wire connections between circuit boards. Phones often have 3, 4 or more flex cables. For example between the the physical keypad and the motherboard or the d-pad and the LCD screen or between screen and motherboard etc etc.
It IS possible a flex cable can get damaged. This normally happens in phones with a slide out keyboard where the flex-cable has to roll back and forth as the keyboard slides in and out. However, such a cable would not I think change the charging behaviour of the phone.
It charges on PC connection but not charger connection. To me that normally indicates a USB port connection problem - bent pin in the slot, possibly even crossed pins or a cracked or dry solder joint between the usb port and the motherboard.
Another thing to consider is whether all the battery contacts are making good contact with the phone. Here again the multiple connections between battery and motherboard can become dry or cracked leading to erratic or underpowered connections.
The keypad being pressed on it's own can again be caused by different things:
1
It could be a faulty or loosley connected flex cable
2
Pressure being put on the digitizer screen by something under the bezel or just a damaged digitizer layer
3
A key that is not releasing from the keyboard properly (is it always the same key or group of keys?)
4
Moisture at many different places inside the phone, including keyboard, d-pad etc. Even when dried out, the residue or oxidisation can continue to cause problems.
So, I would not rule out a flex-cable problem, but it might not be the only fault. Unfortunately then, the technician you spoke to may be correct and it is not possible to guarantee it will solve all problems. Having said that, I would want to say to the technician that I am not going to pay for a new flex if it does not solve any of the problems.
This is where it becomes difficult to decide whether to go for paid for repair or to attempt the job yourself.
Mike
Related
I have a Verizon Samsung Galaxy S3 model SCH-I535 and I was having an issue with the charge port causing a desktop mode to pop up when plugged into my truck. This was effectively preventing the phone from charging because the screen would stay on. I read on a forum that perhaps the pin was bent down slightly closing a circuit that was only intended for certain after-market peripherals like a desktop dock. I noticed that it was in fact bent down, and I tried to gently bring it up, only to break the piece altogether. Now it won't charge or recognize any usb connections. I've begun externally charging batteries and swapping them in the morning and evening, but this is a real inconvenience, especially when I think it could just be replaced. I believe it's within my skills to solder the micro usb port, however I can't find a verifiable source for the part. I'm not under warranty, as I've already replaced the screen once. There's a part on this website called witrigs (unable to post url) that claims to be appropriate, but there isn't much information there. Can someone verify that this part would, in fact, work with my phone, or is there perhaps a better place to find parts?
From what I have read the gs3 needs a hot air gun to desolder the plug not exceptionally difficult but does require the right tools and there is several things close to the plug that you need to worry about.
I think I'm capable of the replacement, but is there anything specific to the micro usb for this device that would prevent a more generic part from being used?
Hi guys. This is gonna sound awkward. I'm having issues in my personal life and I was talking on whatsapp with brother when I got angry and threw my nexus. the screen is broken like colors and stuff and lines so I tries to turn the phone off by touching where the power off button appears on screen butI couldn't.
since I was angry I removed the back cover and cut the golden wire at the bottom point where it turn. I've tried turning it on by holding the cut ends but no luck. tried charger too but nope. All I wanna do is get into recovery somehow (TWRP) and dump my internal storage.
Thank you.
After some thought about your description.... I wonder if you have actually cut the main ribbon cable from the microphone/speakers/USB assembly this is the one that runs down the side of your phone. your best bet will be to purchase another cable assembly.. since you are dealing with a multi conductor ribbon cable.
I really doubt that you will be able to repair and re-connect the cable without some pretty highly skilled soldering ability.
The battery cable is very short and comes directly out of the battery itself... it is not likely that you actually cut it but did cut the main circuit cable. Too Bad, but this will be a real problem for a repair.
no joy... but you might want to investigate a reputable repair shop.
paultbear said:
After some thought about your description.... I wonder if you have actually cut the main ribbon cable from the microphone/speakers/USB assembly this is the one that runs down the side of your phone. your best bet will be to purchase another cable assembly.. since you are dealing with a multi conductor ribbon cable.
I really doubt that you will be able to repair and re-connect the cable without some pretty highly skilled soldering ability.
The battery cable is very short and comes directly out of the battery itself... it is not likely that you actually cut it but did cut the main circuit cable. Too Bad, but this will be a real problem for a repair.
no joy... but you might want to investigate a reputable repair shop.
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Thanks so much for replying. Yes indeed I cut the ribbon cable. I'm in no position of buying a new one. I guess I'm gonna take it to someone with high soldering skill. Before that I'm gonna try tape too
Xami said:
Thanks so much for replying. Yes indeed I cut the ribbon cable. I'm in no position of buying a new one. I guess I'm gonna take it to someone with high soldering skill. Before that I'm gonna try tape too
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Click to collapse
Question: if this ribbon isn't battery wire then why the phone doesn't start
main connection cable ( do NOT cut)
Xami said:
Question: if this ribbon isn't battery wire then why the phone doesn't start
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Click to collapse
That ribbon cable is the one that interconnects the working boards in your phone, Microphone, Speakers, buttons. Unlike the battery cable you probably won't be able to fix it... it is pretty much a replacement only part.
this part is called -- LG Nexus 5 D820 D821 Charging Port Flex Cable Dock Connector USB Port With Mic Microphone Flex Cable Repair Part (amazon.com)
you will have to source a supplier close to you... but the good news is that it is relatively inexpensive... Ebay has it listed for $10USD or so.
not trying to be the bearer of bad tidings... but I've spent 20 odd years repairing computers and associated devices. It is always best if you don't cut ribbon cables.
When looking into the USB port I noticed there is a slight build up of green gunk which probably came from environmental moisture (not sure).
Possibly related to this is that when connecting PC to phone, some USB cables won't work (and sometimes power surge), some only works in one orientation, some only works via the wall charger.
Before I send my phone in for repair, just wondering if anyone here has had a similar problem, and what you did to fix it. Any help and comments will be appreciated.
Hi, i had this corrosion too, what i did (maybe not so sure way) its cleaning the corrosion that was between the pins of the connector, so first i turned off the phone and then i removed it with a needle, be careful with the pins. When you finish use a brush to clean the port a little more and remove the dust it may have, you can put alcohol on the brush.
If your cables are not working you can try to press a bit both horizontal sides of the connector to ensure the pins are always touching. Thats what i did when my usb c cable started to connect and disconnect the phone randomly when i just moved it a little.
ClementNg23 said:
When looking into the USB port I noticed there is a slight build up of green gunk which probably came from environmental moisture (not sure).
Possibly related to this is that when connecting PC to phone, some USB cables won't work (and sometimes power surge), some only works in one orientation, some only works via the wall charger.
Before I send my phone in for repair, just wondering if anyone here has had a similar problem, and what you did to fix it. Any help and comments will be appreciated.
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Hey. Welcome to the club mate. I screwed up my charging port after a trip in Thailand. Some underwater diving & swimming caused the green junk in my port.
I had the same issue such as yours after the trip, Charging was fine but connection through usb on a computer was screwed up.
What I did was, cleaned the charging port with alcohol (Nail polish remover), let it dry & sent it to a nearby Sony Service centre.
They replaced my mother board for free (In warranty). The best part was I had my bootloader unlocked & they gave me a new motherboard with a locked bootloader
Sony service center employees don't know **** about Bootloaders in my country, I'm from India btw.
For some time I had problems with the mic, flickering display and non-responsive touch. I have opened the phone to reseat the flex connection and it has only worsened the problem: the display would not turn back anymore.
I have ordered a new flex cable and the problem persists... but I have a problem with diagnosis. The thing is the motherboard seems to work correctly, as I can find the phone with the Google site (although I cannot play the sound?). On the other hand, before the flex replacement the display would show colorful static, so it does not seem to be physically damaged by my repairs. What else could it be, then? For a while I thought that maybe it is the flex plug on the motherboard, but then the phone is seen as Nexus 5 through USB, so at least some of the data are going through from the USB port to the motherboard...
Without having another working screen, it would be tough to pinpoint the problem.
I do not have another working screen... or so I thought. I have connected the phone through HDMI to my TV and it seems to work, except it is very, very slow. This makes the screen issue more likely.
I agree.
Even a screen that shows scrambled images or static doesn't necessarily mean it's functional.
I've gone through this myself in trying to decide which to buy first: a screen or motherboard.
I have ordered a new display - no luck... It turns out it was the motherboard after all, more specifically, the port for the flex cable. It became more evident when part of the port fell off during the screen replacement...
JabberwockPL said:
I have ordered a new display - no luck... It turns out it was the motherboard after all, more specifically, the port for the flex cable. It became more evident when part of the port fell off during the screen replacement...
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Sorry to hear that.
I recommend looking for a cheap Nexus 5 with a broken screen and working motherboard for a cheap price.
Hi
i have a big problem. I have an unit PX5 with rockchip 8 core with 4gb ram and 32 of space.
Its a radio for renault megane 2 with amplifier and android 10.
My radio was getting very hot, so I removed the dvd and installed a fan.
Sometimes the fan made noise, so I decided to install a switch, to cut the power to the fan when I needed it.
The fan is 5v and I connect it to the usb of the radio (5v)
But when I was installing the switch, I must have made some mistake, and I started to smell burning.
Quickly disconnect everything.
To my surprise, everything worked correctly: audio, bluetooth, screen, etc.
But the wifi, no. If I activate it, it deactivates automactly.
I have tried wipe cache and factory reset.
I think the usb doesn't work either.
Is it possible that wifi and usb share power?
I thought not, but there's just that scorch all over the motherboard.
I would like to know if you can tell me how the Wi-Fi is powered, I don't care about USB.
I am attaching photos of the wreckage. Flex cable its damaged but screen works perfect. Wifi chipset i think thats okay, but see the photos please.
Thanks for your help!
Looks like a power regulator blew. Might be possible to replace it but with that much char I'm not sure about the health of the board. To get it off the board you'd need a heat gun with a small nozzle, but you could end up causing more damage to the board.
V0latyle said:
Looks like a power regulator blew. Might be possible to replace it but with that much char I'm not sure about the health of the board. To get it off the board you'd need a heat gun with a small nozzle, but you could end up causing more damage to the board.
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You can fix that with a soldering iron. A couple ways to do it. If you can get in with a small pair of cutters...
Carefully cut the leads* then use a soldering iron at 720F and quickly remove it what's left , one at a time. A lot of times I'll heat it and tap it off. Too much heat and/or for long will lift the pad, you have to be fast.
You can somewhat easily hand solder it on if you have the skillset/tools after you get the solder pads fairly level.
There be more damage including traces.
If you never did it, this isn't the place to learn.
Otherwise you could probably replace it but you might need to do some bridging to repair missing pads or traces.
*small precision cutters, you must not pull up or torque it sideways etc or you'll damage the pad. So you push downward slightly as you cut.