i815 won't turn on!!!! - Galaxy Tab 7.7 Q&A, Help & Troubleshooting

Tab: SCH-i815 7.7
ROM: Cyanogenmod 10 (locerra)
Background: Used last night, 40% charge. Set down by my bed. Left unplugged all day. Device left for 19 hours. Because of the CM10 ROMI was running, there is a lot of battery discharge when sleeping. I am sure battery died overnight or during the day.
Situation: Device wont turn on. Plugged into charger for 2 hours, nothing. unplugged and replugged to charger. Held button for 15 seconds. Tried a different charger. Screen just stays black.
I am going to bed now so can't reply until tomorrow.
Help?!?

So I am not asleep yet but I think I solved it. I had to unpack the original samsung charger that came with it. I wanted to keep it sealed incase I wanted to return it or sell it. (i missd returning it by 1 day, damn 14 day policy.)
Turns out when the battery is super drained, you need the original charger to start it. Apple charger, HTC charger and connected to pc, none could get it running.

Glad you got it running. Is data working for you on cm10
Sent from my Nexus 7 using xda app-developers app

The original charger is capable of 1500ma while a USB port is 500ma.

Thread moved to Q & A section.

since you are on CM10.
what's the gaming performance on this rom? and is there any kind of crashes in any application? bootloops?

Related

Bump Charging has helped!

ok, so I'm running faux's rom and I have run CM 7. I have tested this a few times and each rom and it seems to help improve battery life.
Since the drivers are screwy I noticed when I charged my phone it would say 100% but I would unplug it and it would drop down to 97% right away. I think the lower number is the accurate one, So the battery really isnt getting fully charged because the phone thinks it is so of course it will die sooner
So what I did was let it charge to 100% then unplugged it, it went down right away. I plugged it back in and it started charging again, in a few minutes it showed 100%, I unplugged and it showed 97%, so I kept repeating this then eventually I unplugged and it was 98%, then eventually 99%. After doing this my battery lasted a lot longer. I usually have keep an extra battery on me and usually have to switch but for the first time my g2x lasted the whole day! So give this a shot.. it could help if you suffer from really bad battery life.
Off topic.
Im From Southern California...be visiting New York on Monday. Good stuff...small world some times.
could unplug, then turn off, plug in and charge while off for a while, the unplug and turn on, then plug back in and let charge. then wipe batt stats and unplug. works for me.
I have one extra battery. I never charged my phone through the charger it came with. I always charge my battery with the portable charger. No doubt the portable charger takes 6-8 hours to fully charge my battery, but on the upside my battery lasts for more than a day.
Sent from my LG-P999 using XDA Premium App
I noticed a similar thing recently. I generally charge my phone overnight while I'm sleeping and use it for an alarm clock. One morning I decided to reboot my phone (my experience is that it needs a reboot every couple of days or various things stop working) before I got up, so I powered it down, still plugged into the charger. I then tried to power it on, but instead of the boot screen I got the device-off charging animation, indicating that it wasn't fully charged, even though it had said 100% before I powered it off. After letting it sit and charge while off for another hour or so, I booted it, and I think I got exceptionally long battery life that day (although my days are all so different it's hard to compare one to another).
I think bump charging does help, but its not good for your battery in the long run
Sent from my LG-P999 using XDA Premium App
c19932 said:
I think bump charging does help, but its not good for your battery in the long run
Sent from my LG-P999 using XDA Premium App
Click to expand...
Click to collapse
well hopefully they fix the driver issues so we wont have to do it too much longer One can hope right? hahaha

Battery charging super slow

Is anyone else having problems with there battery charging super slow? It's been on the charger for almost 1 hour and only increased by 7%. I am using the stock charger.
Last night it was at 8% when I put it on the charger and after 3 hours it was only at 62%.
Is this normal?
yep it took me about 6 hours to charge completely with usb from pc. is it because i charge from pc? gonna charge using stock charger after battery depletes and report back with the results.
sert89 said:
yep it took me about 6 hours to charge completely with usb from pc. is it because i charge from pc? gonna charge using stock charger after battery depletes and report back with the results.
Click to expand...
Click to collapse
HTC charger charges with 1 amp of current. Standard USB charging (ie through a pc) is 0.5 amp. It will take at least twice as long charging via pc USB.
Sent from my HTC Sensation Z710e using XDA App
Mine just now seemed to be taking forever to charge (4+ hrs, only up to 80%) so I took a chance and rebooted it. Came back on saying 100%. WTF? I've previously noticed some odd behavior in that unplugged it would sit at 100% for a very long time, so now I'm even more suspicious.
yep was discussing it over here
http://forum.xda-developers.com/showthread.php?t=1130390&page=3
jschu22 said:
Mine just now seemed to be taking forever to charge (4+ hrs, only up to 80%) so I took a chance and rebooted it. Came back on saying 100%. WTF? I've previously noticed some odd behavior in that unplugged it would sit at 100% for a very long time, so now I'm even more suspicious.
Click to expand...
Click to collapse
Same with me, all night chage only 66% ( hot) but reboot - 100%
Mine took almost 5 hours charging from 4% to 100% yesterday, using the proper 1A mains charger. My HTC Desire could fully charge from USB in less time than this!
I have problem with charging 2. from 14% @ 8AM till now 79% @ 1PM..
HD2 charged battery way, way faster...
edit:
after restart 93%
I figured out what's causing the problem. You have to use the cable it came with. Every time I user a different cable my battery charges writers but then I switch to the stock cable and everything is fine.
Sent from my HTC Sensation 4G using XDA App
jrwingate6 said:
I figured out what's causing the problem. You have to use the cable it came with. Every time I user a different cable my battery charges writers but then I switch to the stock cable and everything is fine.
Sent from my HTC Sensation 4G using XDA App
Click to expand...
Click to collapse
I am charging using the original HTC cable, plug to Power. it took me 5 hours to charge from 1% to 96%. And still charging...
What could possibly be wrong.? Or is this acceptable?
Don't use pc usb to charge.
Sent from my HTC Sensation Z710e using xda premium
egg_n_ham said:
I am charging using the original HTC cable, plug to Power. it took me 5 hours to charge from 1% to 96%. And still charging...
What could possibly be wrong.? Or is this acceptable?
Click to expand...
Click to collapse
Sometimes the phone doesn't display the battery % correctly, so when it reaches 100mA during charge, restart your phone. Most probably you will see 95% to 100%, or that's what I normally noticed.
Note: I believe our battery starts charging at 100mA when it's almost full, so let it charge for about 10mins more after it reaches 100mA then restart your phone. Tedious work but no choice as of now
Guys check if are having any CPU intensive apps running (even in the background) if charging takes that long. Mine is getting charged in 2,5 hours via AC
Try this guide:
http://forum.xda-developers.com/showthread.php?p=16808932
Hi.
I think this is good place for my question.
I have 1.5year old Sensation. I bought it with GB 2.3.3 (of course), the updated OTA to ICS 4.0.3.
Charging time was always 2.5hours. I was always charging from 14% (4%) to 100% with original charger.
Now, the charging time is 4.5 - 5hours for few months already.
First 2hours, it's charged to 75%, and then it is slow as hell. Another 2.5-3hours from 75% to 100%.
I am using original charger, when I am charging, built in "battery meter" says "charging AC", so the cable is detected correctly.
I did factory reset (didn't help). I still have stock ROM, no root.
Can anyone tell me why it is getting slower and slower?
Time to buy an anker
Envoyé depuis mon HTC Sensation Z710e avec Tapatalk
I got similar issues and I bought a new battery(not stock one or Anker) for my sensation. It still takes 6-7 hours to finish a charge. I found that charge becomes very slow when the battery charges to 60-70%.
Does anyone one know the solutions?
Sent from my HTC Sensation Z710e
So I wrote an email to repair center, since my Sensation is still under warranty period.
They replied me it can be either motherboard fault, or faulty battery.
So I sent it to them and they replaced the battery.
Now, the charging time is 2hours and 15mins, I'm very happy

[Q] Battery Staying at 100%

I've noticed that the battery meter will sometimes stay at 100% for a while and then all of the sudden drop to the actual percentage sometime later. A reboot after unplugging the phone will fix the problem and report the battery % at the correct level. I was wondering how many other people were experiencing this, or if it is just a hit or miss thing?
I'm still on stock, unrooted, no mods. It's a straight out of the box Skyrocket.
Also, does the problem remain after rooting, modding, etc.?
I asked this on the battery results thread in general, and only received one response, so I figured this would be better in Q&A.
I had the same issue, but it has only happened one or two times.
Showed 100% for hours then rebooted and it showed 73%
I don't know how long you've had your phone, but it takes several cycles from full to empty for the battery to calibrate correctly. During that time you can get some really funky readings on it.
I am experiencing the same problem.
I've also had a hard time charging the phone. I've left it plugged in upwards of 18 hours, only to find it saying its only 83% charged. That may just be another symptom of the same problem though.
Do you think this is a phone or a battery issue?
bl2520 said:
I am experiencing the same problem.
I've also had a hard time charging the phone. I've left it plugged in upwards of 18 hours, only to find it saying its only 83% charged. That may just be another symptom of the same problem though.
Do you think this is a phone or a battery issue?
Click to expand...
Click to collapse
That sounds like you were plugged into a pc vs ac power and had heavy usage during that time.
Mine charges very quickly when at idle and plugged into the wall.
I've had my phone since the day it launched (the 6th) and just experienced this for the first time yesterday. It was indeed quite odd to see.
I have had this happen one time. I also noticed the phone got very hot.
It actually happend yesterday, stayed at 100% almost all day then just shut off and wouldnt reboot.... freaked me out!!
Sent from my SAMSUNG-SGH-I727 using xda premium
I have had this issue only when using an old iphone wall charger have. i can charge with any of our multiple other chargers with no issue....i use a usb cable plugged onto that apple wall charger and it happens every single time
Sent from my SGH-T989 using XDA App
I think that the battery is pretty wonky. I am not sure if the NFC addition is causing these issues but some people are having amazing life ans some people (me included) get horrible. I am getting a warranty exchange on my battery. No way I should drop 12% in an hour and 20 minutes when the only usage is 19 minutes of checking email. If I have to have it plugged in every time I turn around it is not exactly a wireless device now is it?
Sent from my SAMSUNG-SGH-I727 using XDA App
00mred00 said:
I have had this issue only when using an old iphone wall charger have. i can charge with any of our multiple other chargers with no issue....i use a usb cable plugged onto that apple wall charger and it happens every single time
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
i think that u just solved my and many more ppl's problem i am using the same iphone wall charger and i just plugged my usb in there and the battery wouyld stay at 100% all day long and when i connect the charger it says "disconnect charger battery is full" but i think this will solve my problem man thank u very much for posting this ! im glad ive read it because this is the my second galaxy s2 with the same problem i went to the warranty and the exchange it but still the same problem so now i know it HAS to be the iphone charger!!
Strange, I was just reading this thread and thinking I have never experienced this. Then I checked my battery stat and it showed 100% even though I've been using it for an hour and a half. I restarted and now reads 90%.
Had my phone for almost a month. Rooted only on stock ROM. Just took it off USB cable from laptop an hour and a half ago.
yvrRome said:
Strange, I was just reading this thread and thinking I have never experienced this. Then I checked my battery stat and it showed 100% even though I've been using it for an hour and a half. I restarted and now reads 90%.
Had my phone for almost a month. Rooted only on stock ROM. Just took it off USB cable from laptop an hour and a half ago.
Click to expand...
Click to collapse
I had the same issue. But I read on a thread that cause is that u use a charger & cable that is not Samsung. I had tested and it is true. If u charge with the charger it will befine
That's was stupid of me. I think I am on that thread
Sent from my SGH-I727 using XDA App
My still stay at 100% all time with Samsung charger, any fix?
cgm8 said:
My still stay at 100% all time with Samsung charger, any fix?
Click to expand...
Click to collapse
I think we narrowed it down to being a bad charging circuit in the phone or battery triggered by a .1a charger.
When we got our new skyrockets they stopped doing it.
Sent from my SAMSUNG-SGH-I727 using XDA App
cgm8 said:
My still stay at 100% all time with Samsung charger, any fix?
Click to expand...
Click to collapse
I was powering my phone off, plugging the power in and allowing it to recharge. The phone would automatically power on as soon as I connected the power but I didn't think that mattered. It turns out it did. If I powered the phone on and then connected the power, the battery meter would work correctly.
This was different the Captivate I had previously. That phone had the capability to charge while powered off. There was even a charging graphic that displayed while the phone was off.
The Skyrocket did not have this same feature when I originally bought it. However, ATT did an update at some point and now it does. I've been unable to re-create the stuck battery gauge since that update.
please only use the charger that came with the phone. other chargers, after prolonged usage, may cause issues.
The charger that came with most skyrockets is a .1a charger and causes the issue as well. A few reported getting .7a chargers in the box but most have been .1
I have tested the iPhone charger theory on 5 phones now. Phone 1 and 2 experienced the issue. Phones 3-5 did not
Its more than just the charger. The phones experiencing this either have a bad battery or it's in the phone
orlandoxpolice said:
please only use the charger that came with the phone. other chargers, after prolonged usage, may cause issues.
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I727 using XDA App
From day 1 with the skyrocket, I have used an old wall charger and cable and had this problem daily. I plug it in at night and in the morning, it's at 100% until I reboot, or some other random event that drops the percentage to the real battery stats.
Because of this thread, I dug out the box and used the wall charger and cable that came with it, and this morning shortly after unplugging the phone, it was at 99% and dropping, just as it should. Very glad I tried this.
Ummm no.....
00mred00 said:
The charger that came with most skyrockets is a .1a charger and causes the issue as well. A few reported getting .7a chargers in the box but most have been .1
I have tested the iPhone charger theory on 5 phones now. Phone 1 and 2 experienced the issue. Phones 3-5 did not
Its more than just the charger. The phones experiencing this either have a bad battery or it's in the phone
Sent from my SAMSUNG-SGH-I727 using XDA App
Click to expand...
Click to collapse
I did a recheck of my black cube SR wall charger (Samsung part # ETA0U80JBE).. It is NOT .1a it is 1.0amps - which - interestingly enough is EXACTLY what my iPhone3g power cube right next to it delivers.
The .7am Samsung charger has the usb connector on the side, and is part number ETA0U60JBE - delivering 5v at .7 amps (30% decrease over the little cube device). That was the charger my SGS-II had. My S/R came with the 1.0 amp ETA0U80JBE version.
One amp will charge the phone MUCH faster than the USB port. Per the spec, the typical USB device cannot drain more than 500mA (1/2 of what the power cube supplies to the phone).
Unfortunately Apple and Samsung both have the cubes pretty well locked up, so I cant compare the components, but at a first glace they appear to be absolutely identical, both putting out about 5.1 volts at zero load.

G2x won't charge

I plugged my phone in after its been sitting for almost a year and it wouldn't charge. Took battery back out and put it n a wall charger batter charged. Put it in the phone and it powered on so I plugged it into USB to wall charger that came with my galaxy s 2 and it said it was charging... Walked away for a while when I picked it back up it said 1% then turned off.
Is it the rom ??
Also I have issues turning it on sometimes. It's like the power button does not always work, but once the phone is on the button works to wake phone up and turn off screen every time.
It may be a battery issue. Try a new battery.
Sent from Heaven
as he say it is most likely the battery
sent via Nexus 4 with Xylon rom
I'm having the same issue. I think it may be the charge port also because I think mine is going on me. I put it on the charge and walk away and check back on it and it wasn't charging. I went into CWM and cleared the batter stats and its working so far but I'm not sure for how long.
sent from G2X running Eagleblood build 5
ipeench said:
I plugged my phone in after its been sitting for almost a year and it wouldn't charge. Took battery back out and put it n a wall charger batter charged. Put it in the phone and it powered on so I plugged it into USB to wall charger that came with my galaxy s 2 and it said it was charging... Walked away for a while when I picked it back up it said 1% then turned off.
Is it the rom ??
Also I have issues turning it on sometimes. It's like the power button does not always work, but once the phone is on the button works to wake phone up and turn off screen every time.
Click to expand...
Click to collapse
Like the guys said the battery gone bad, you may try diffent ROM just to make sure if its the batt.

[Q] slow charge, fast drain, hot batt, jb update

​ Hi guys
I have a galaxy s relay 4g
It took 2 hours of constant usage, to kill the battery from 50 to 0%
Figuring this was normal, I was configuring everytthing while downloading 50apps over wifi
Note phone was on airplane mode, but wifi was on.
Next day I updated from stock ics to stock jb
Turned it on, it was at 91% and after 5 min of usage the phone said it was too hot to charge the bat.
Phone went from 91% charge down to dead with one hour of moderate usage and 2 hour siting idle on airplane mode, wifi on..
It was 46c on batt temp whole time
Charged for 3 hours from pc usb and it gained 3%.
Charged another 3 on wall socket that came with nokia lumia, rated at 1400mA.
Charged 15%
The battery info showed that even though the phone was off, it woke up many times during the night -- IT WAS OFF as in the battery with the 4 white circles on the bottom were showing!
Turned off, removed sdcard, factory reset (left sd out, its still out) i
Came back ok, it syned to google and reinstalled all my apps, then died again
I've tried 2 batteries, and 3 different chargers,
I factory reset the phone too.
Wake lock says the android system used 18% of the battery... other than that I can't see anything obviously wrong
Stock on any device is also resource hungry.... What are the specs of the chargers you are using...certain chargers will not put out the needed amount of ma or volts...which also messes with a Samsung battery overcharge feature
Sent from my SPH-L710 using Tapatalk
Charger 1 is my pc usb port, which charged my other two phones (mytouch q by lg and sammy captivate glide) about 70% as fast as charger 2.
Charger 2 is what came with phone but doesn't appear oem. 5.7v at 600mA
Charger 3 is the oem charger which came with wifes lumia 925 which rates at 5v at 1400mA
Its "charging" in my car now, no sim card, wifi on and connected to a medium strength signal, 0% charged and I wached the voltage steadily decline as I hit refresh in the gsam battery monitor. Started at 3.3v and in a minute was at 3.18v. Still 0%
Car charger is a no name brand (which kept my captivate charged pretty well despite using gps at the end of my 6 hour drive the phone was still at 75%.)
The battery is samsung oem.
The first battery I tried is also samsung oem.
I also have a 5v 1amp charger that will fill both phones between 1 and 2 hours if memory serves, the 1.4 doesn't seem to go any faster as I guess the won draw much if any more than 1 amp.
Given all of the above I'm inclined to think its software or other hardware issue.... phone was sold as "seller refurbished" on ebay, but the description says its just an open box sale of a phone that came back within the first 7 days....and yes I bought a square trade warranty in case some BS like this happened.... but want to try and fix before going that route.
Is there no way to factory reset to the original ics firmware?
I see you also have a relay, once I get this all figured out id love to root and rom mine like you have yours!
I know the newer android roms have more features but are they more or less responsive in general?
Main reason I got a relay instead of another captivate glide is the relay has much more rom development.
And now the red charging led isn't even turning on..... I wonder if its defective.
Shame I can't return it now, the screen has light scratches (was in my pocket while I was working under my carL
And it was sold in like new condition
Grabbed a brand new USB cable plugged the phone into a 5th charger, oem HTC radar, 5v at 1amp
swapped the battery for the 1st one I had.
Appeared to charge fine. Pulled out the charge cord at 50%, plugged it right back in.... the battery charging screen went from about 50% down to 20% in 1 second.
Confused, I left it plugged in and went to bed.
Got up this morning and it was dead again.... while plugged in, while off, not even the charging led was on. switched to the 1.4A charger, still nothing... hit the home button a couple times and the thing woke up into the battery charging screen (it ignored the power button the whole time)
The gsam screen was even more interesting:
it doesn't show much but the line graph showed a rapid decline from 20% down to almost 0 from some short time before 3 am, then
3 hours from 3am to 6am, the charge went from near 0 to 50%, and then in half the time back down to near 0.
The temp graph wasn't a line, but fragments of one
does Gsam show the amperage of the draw or charge on yours? its only ever given my the voltage of the battery and shows 1mA on the bottom of the battery,
ebay seller says clean the charge port with alcohol.... not sure why someone should need to do that on a "like new" phone but I'll have to try and find something tiny to shove a paper towel in there with..... that would account for the not charging but not for the high drain.... could thins thing have a short someplace?
sounds to me like a defective device. the fact that you did a factory reset and it's still not charging even with it turned off is probably the biggest sign there. it can't be any apps you've installed because you wiped them all off. i think you've gone way above what should be normally expected of a customer in terms of troubleshooting your device. hairline scratches on the phone are fine. you should still be able to return/exchange it IMHO. especially with the squaretrade thing.
yes, it's possible to flash back to stock ICS but if it's not working with the factory rom (whether ics or jb) the phone obviously has issues.
i just bought mine a couple weeks ago too, though not over ebay. i found a local tmobile "authorized" store (advertising on craigslist) that was selling stuff with similar description - open item or customer purchased and returned within a week. i have used mine on all sorts of chargers without issue: a motorola dual-usb rated at 750ma in the car, a monoprice 2.1a charger built into the 10-outlet power strip at my desk, 2 different laptop usb ports, and a samsung wall charger rated at i think 1.8a which came with my wife's galaxy tab 2. i never ran stock rom for more than about a day or so, just to verify proper operation of the phone, and now i run cyanogenmod11. i can go all day on a charge with what i consider medium to semi-heavy usage, which i think is great.
for example, yesterday i unplugged at about 9am after an overnight charge (with the phone on - i almost never turn it off because i have to be able to receive on-call alert emails from work). i got the day started in the attic installing radiant barrier (so it was rather hot). i had the phone in my pocket streaming a shoutcast station over wifi for probably about 4 hours. later, i watched a 30 minute show on netflix (also wifi), played some wordfeud, surfed the net a bit, watched some youtube videos on fixing my weed eater, did a few emails for work, probably 20-30 texts and maybe 10 minutes worth of phone calls. by 11pm i was still around 30% charge remaining. at no time did i plug in my phone during the day.
i have an extended battery on its way from china, so i expect to be able to go 2 full days on a charge with similar usage. and the thicker back plate will make it easier to hold, since i have such long fingers.
tl;dr - you got a bad phone. exchange it.

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