Dead nexus after LCD replacement - Nexus 7 Q&A, Help & Troubleshooting

Replaced the lcd, but before this it was left to totally drain.. now when it's plugged in to the wall it wont charge, doesnt warm up, doesnt pop up on my PC when plugged in.. I have the strangest thought the known issue with charging is happening but because it doesnt have enough power to get to the bootloader i cant force it to power off...
Will connecting a spliced usb cable to the + and - points on the battery and plug it in to the mains work to get some juice into this battery? i know it works for old nokias etc/...
cheers

anarchyuk said:
Replaced the lcd, but before this it was left to totally drain.. now when it's plugged in to the wall it wont charge, doesnt warm up, doesnt pop up on my PC when plugged in.. I have the strangest thought the known issue with charging is happening but because it doesnt have enough power to get to the bootloader i cant force it to power off...
Will connecting a spliced usb cable to the + and - points on the battery and plug it in to the mains work to get some juice into this battery? i know it works for old nokias etc/...
cheers
Click to expand...
Click to collapse
In most cases it will work. Are you sure your USB port wasn't a part of collateral damage when you were replacing your LCD screen ? If you have a multimeter, just check the connection in the microusb. Probably the charging of the n7 battery may awaken it from its slumber, what else you can try is to use jumpers to connect another battery that you know that is fully charged with almost the same voltage and try to boot up the n7?! Maybe that will help ?

Red Devil said:
In most cases it will work. Are you sure your USB port wasn't a part of collateral damage when you were replacing your LCD screen ? If you have a multimeter, just check the connection in the microusb. Probably the charging of the n7 battery may awaken it from its slumber, what else you can try is to use jumpers to connect another battery that you know that is fully charged with almost the same voltage and try to boot up the n7?! Maybe that will help ?
Click to expand...
Click to collapse
awesome reply cheers

Related

Weird Problem

My Atom has been working excelent for more than 6 months.
The problem is that when I try to charge it through the AC or a USB it doesnt charge anymore, the orange light doesnt turn on and the symbol in the phone turns only for a few seconds fron the battery into a wall plug, but then nothing...
I took out the battery and then charge it and worked but only when the device is off completely not when it is on or on stand by...
What can I do?
I just made a self diagnostic and when it gets to the part of the USB/AC Charging it says battery 100% charged (it passes the test) and that is not true, battery is at 18% right know
Same...
I have the same issue where my battery always shows as 100% even when you use it to 1% its still shows 100% and then it just quit when it runs out. Damn weird.... Just happened today and I only had the Atom Exec for 2 months... Any input would be much appreciated. Thanks!
Resolved
It was faulty battery not reporting correct capacity & usage.
I had a similar problem with my Atom. It could not charge the device from USB at first, then it got worse and stopped to charge from wall outlet. What I found out was that the connection plate at mini-USB port of Atom was worn out slighlty. I solved the problem by forcing usb cable connector into a mini-USB port, so it went further a bit (half a millimeter) and now everything is Ok - no problems to charge from either USB cable or wall charger.
I had the same problem, and found out that one pin in the mini usb socket bent downwards, fixed it myself and now its working fine
ozamalloa said:
My Atom has been working excelent for more than 6 months.
The problem is that when I try to charge it through the AC or a USB it doesnt charge anymore, the orange light doesnt turn on and the symbol in the phone turns only for a few seconds fron the battery into a wall plug, but then nothing...
I took out the battery and then charge it and worked but only when the device is off completely not when it is on or on stand by...
What can I do?
Click to expand...
Click to collapse
Mate! You gotta bring it to the SC... Its the fuse. The charging loop gose through the fuse and since it doesn't charge - most likely its the fuse (yo can test it with the normal tester...) If its not the fuse, it can be either of two - UEM Chip (Universal Energy Managmnt) or your PA (power amp). You can test it by measuring the resistance on the very left contacts of the battery ON YOUR PHONE! If the resistance close to 1 - its PA...
Wouldn't recomend to replace it yourself... Go for repair centre.
It's going to be a loose USB connection...
I did it on mine a while back, you have to hit the patch cable fitting in vigorously to the unit, and then from that day forward, no problems with charging!
Clean battery + phone><batt contacts if that makes you happy (it made me reassured)
G

XDA Mini S + USB Charging

Not sure if this is right part of forum, but here it goes.
I am having an issue with the charging of my O2 XDA Mini.
If my battery dies, with still a small bit of power left in it (enough to get splash screen) and I go to charge it works fine no problem. Now over the wkend my phone died on my and I left it till this afternoon when I tried to turn on, it wouldnt turn on at all (not even splash) because obviously the battery is completely dead. Now when I go to plug it in, it wont charge, from USB cradle, the little orange light to say that its charging doesnt even come on.
Last time this happened I eventually got it to work via a friends socket (plug) charger, rather than USB, charger. Is there any reason for this or anyway that it can be fixed that even when the battery is completely dead I can charge it from my USB cradle.
Any help would be apreciated.
Thank you in advance
Rattlehead
Sorry to bump this, but does anyone have any idea. I beleve the cause of this is due to the fact the USB power from the PC isnt enough to get the charging process started, is there anyway to get this done via the cradle.
Thanks
Rattlehead
You'll need to use a charger that plugs into a wall socket I'm afraid. This happened to me once & that was the only way I could get it to work. If you search on Google, you'll find methods that involve a stripped down usb cable, but a wall charger is definately easier.
Good luck.
Should any usb based wall charger work?
I have a Motorolla one and Ive tried that but that didnt work.
I know for a fact that when I use my friends one it works and will charge, but he aint round for another 2 weeks
Poop
Rattlehead.ie said:
Should any usb based wall charger work?
I have a Motorolla one and Ive tried that but that didnt work.
I know for a fact that when I use my friends one it works and will charge, but he aint round for another 2 weeks
Poop
Click to expand...
Click to collapse
You cannot charge a totally flat battery through usb cable using PC,cuz it only supplies 0.5(500)amp,whereas to get the dead battery back into charging,it requires a supply charge of 1.0(1000)amp,secondly you can only charge the phone via usb if it's working normal and not when it's dead,as you cannot boot into OS.
Therefore,it'll only start to charge with a 'Wall Charger' which only supplies 1.0 amp,your friend's Wall (Mains) charger must be suppling a 1.0 amp charge.You cannot even charge it with the Motorola usb charger cuz it also supplies only 0.5 amp.So try to get a Wall (Mains) charger to get it start charging.
OR,
Yes! you can Jump start the battery using Motorola charger,but you'll have to sacrifice the motorola charger to do it,as you'll have to cut off the usb plug of the charger cable end and attach the 'Red' wire to the '+' (Possitive) connector of the battery and black wire to the '-' (Negative) connector of the battery and give Shock Charge to the battery for 10 seconds,repeat this for 4/5 times,it'll give the battery a jump start and will increase the 'Pulse' level of the battery,after that put it in the phone and check if it loads up,if it does then you can charge it via usb cable connected with PC.
Good luck
BTW ! there's an excellent thread regarding charging to avoide the battery to go flat and saving from getting into this situation,it wud be very info for you,check it also :-
http://forum.xda-developers.com/showthread.php?t=342162
Cheers
zabardast_1 ,
You are the Guru ~
sorry couldnt reply to you before now, zabardast_1 thank you so much.
Thats great will have a look tonight and see what I can do
Here is a simple way of solving the problem, go and buy a charger, they cost next to nothing.

HTC TyTN does not charge anymore.... Need Help

Hi Guys
I have a problem with my TyTN at the moment.
My device is not charging.
Yesterday i put it in my Docking Station and wait a little time.
But Now the Tynt isnt charged.
I think ist a Problem with my TyTN Hardware.
I have all Power Supplys used they i have, but it doesent work.
Can you help me?
Its this a problem with the accu or a fuse on the circuit ?
Sorry for my broken english i hope you understand me.
Regards Patrik Laube
Hello,
first of all, try to soft reset the device.
If it fails, hard reset it.
If it doesn't work, go the service center.
Good luck
The above advice is fine. But you did not say if any of the LEDs are lit.
Do you get the red NO CHARGE LED?
Does your phone operate normally except for not charging?
Mike
Hello
My Phone is working fine but i cant charge it with the original HTC adapter.
I must load the accu with a special loader.
USB and Charge dont work....
And i have no warranty I cant send it to my operator.
When i plug in the USB Cable it doesent make everthing.
I think it was a to high voltage on the USB or the USB Ground ( - ) had a electrical Power for a litte moment.
Have you an idea?
Thanks for yur help.
Regards Patrik
I had a similar problem, which was sorted by a new rom, but I ascertained it was software problem when I realised it charged when powered off.
PatrikLaube said:
Hello
USB and Charge dont work....
And i have no warranty I cant send it to my operator.
Have you an idea?
Thanks for yur help.
Regards Patrik
Click to expand...
Click to collapse
hi,
try this: when your device is connected via usb, tab on the battery icon in the taskbar on you device, go to the register "advanced" and check/uncheck "When Device is turned on, do not charge the battery when connected to the pc"
thats it
greetz
mizi
I'm having an issue along these lines, also.
My phone has been working fine untill the other night when I tried to charge it via the wall electrical outlet. It will not charge at all, the battery has been drained to nothing and I can't turn it on. The yellowish light doesn't turn on when I plug it in like it used to.
I don't know if this is a battery issue or an issue with the USB connection inside of the phone. On a side note, when it did have power and I tried to connect it to the USB via the PC; it didn't work. The phone was on, but the computer didn't even notice the phone was plugged in. That leads me to believe it would be a connection issue; but I'm not quite sure.
If anyone has anything they can add to this I would appreciate it, thank you.
P.S. Bringing it to a service center is a bit out of the question in the mean time seeing as it was bought on eBay and funds are limited for the time-being.
MiZi666 said:
hi,
try this: when your device is connected via usb, tab on the battery icon in the taskbar on you device, go to the register "advanced" and check/uncheck "When Device is turned on, do not charge the battery when connected to the pc"
thats it
greetz
mizi
Click to expand...
Click to collapse
Hello, I cannot find the "When Device is turned on, do not charge the battery when connected to the pc" in my device. My Rom is WM6.1 CE OS 5.2.20273 cooked by dvha79_ddt.
My HTC TyTN has the sample problem, but i can use the USB to charge normally. It cannot work using my AC adapter Only when the device is open...
About your Battery Issue.
I'll tell you exactly why ur phone isnt charging anymore... If you have been charging it alot on the USB or pretty much any!! charging on the USB u have killed ur battery, never charge your phone on the USB it kinda sucks they should make these phones able to be Sync'd thru USB without a battery cause these batteries should not be powered thru the USB over Time... from syncing to your pc will kill these batteries i have noticed that when u sync this Tytn Ithru USB and the device is at say 70% it charges up to 100% pretty fast i would recommand to you and anyone who reads this dont sync your TYTN or any HTCC phone for to long to the USB Cause it will Trash your batteries Life down the road... Hope this was HELPFUL.
Cheers
Paul
PatrikLaube said:
Hello
My Phone is working fine but i cant charge it with the original HTC adapter.
I must load the accu with a special loader.
USB and Charge dont work....
And i have no warranty I cant send it to my operator.
When i plug in the USB Cable it doesent make everthing.
I think it was a to high voltage on the USB or the USB Ground ( - ) had a electrical Power for a litte moment.
Have you an idea?
Thanks for yur help.
Regards Patrik
Click to expand...
Click to collapse
hi, did anyone solve this problem ? ive got the same problem with my htc touch cruise, i think it charges when turned off but doesnt when on. the orange light doesnt turn on when i plug usb to charge it and it doesnt sync thru the PC neither.
Does anyone has a solution to this ?Thanks a lot!
does anyone has a solution to this ?
hi, did anyone solve this problem ? ive got the same problem with my htc touch cruise, i think it charges when turned off but doesnt when on. the orange light doesnt turn on when i plug usb to charge it and it doesnt sync thru the PC neither.
Does anyone has a solution to this ?Thanks a lot!
^I'm having the same problem with my herm200. I did the soft reset, hard reset changed ROMs but still the same problem. I don't think it's the usb connector because if it is it wouldn't have been able to charge the phone even if it's turned off. Before I'm able to charge it turned on but it would take a few minutes before the orange led turns on, but when I use the phone or if I receive a text the orange led would turn off it's like the charger disconnects but after a few minutes it would go back again. Now it just wouldn't charge turned on, sometimes it gets worse where it just wouldn't charge on or off.
Now I'm already planning to buy an external battery charger.
gypsygirl13 said:
^I'm having the same problem with my herm200. I did the soft reset, hard reset changed ROMs but still the same problem. I don't think it's the usb connector because if it is it wouldn't have been able to charge the phone even if it's turned off. Before I'm able to charge it turned on but it would take a few minutes before the orange led turns on, but when I use the phone or if I receive a text the orange led would turn off it's like the charger disconnects but after a few minutes it would go back again. Now it just wouldn't charge turned on, sometimes it gets worse where it just wouldn't charge on or off.
Now I'm already planning to buy an external battery charger.
Click to expand...
Click to collapse
Are you using an official 1000mA charger? (Not a 500mA one) 500mA ones work, but they are under-powered and can cause strange behaviour, like not charging whilst turned on or whilst on a call. Similar problems can be found with car-chargers that will not charge until the device is soft reset.
Mike
^no it's not the official charger, I have this usb wall charger called Power Juice (phone and mp3 charger).
Input Voltage: AC100-240V
Output Voltage: 5V
Output Current:1000mAh
Do you think it's because I'm not using the original charger?
fixed my charging problems
The boyfriend told me to try a new cable for my charger so he bought me a 5pin usb cable, tried it at home and it worked! I still need to turn off the screen sometimes but that's ok at least I don't have to turn off the phone anymore. Now my battery charges less than 3 hours.
Hold both SoftKeys and Then press the Power button
Or you can also hold both softkeys and then put your stylus into the reset hole.
answer why it does not charge through the usb
Sorry for the very very late response. Under electrical legislation all hand held electrical devices must be insulated and fused. Some of the chargers that you can purchase are sealed without fuse which indicates that the phone has a fuse contained within its circuitry (or there may be 2 fuses one in each device) .
The problem you have encountered is that you have connected your phone to a computer or mains supply to charge. There has been a surge in the electrical supply either on connection or by un-connecting from these supplies (e.g. connect to the computer as it is booting would see a 65w signal through the USB) and this more often than not blows the fuse which sits on the PCB (printed circuit board) just after the usb connection internally to the phone.
you can either have the fuse fixed for 20/25 gbp or you can purchase a new circuit board or you can use an external charger for the battery. As it is only the power input point that is faulty.
hope this helps
Since we are at this non-charging & battery issue, I would like to ask this question on the D838pro. My battery won't charge even after 24 hours of charging. The red LED blinks thru the whole process. The LED did not turn on to orange or green. It is the battery problem because my spare battery works well. I would like to know what is wrong with the battery as I am willing to strip down the battery. Could it be the battery circuit or wiring that had fired?
cyberdroxxx said:
Since we are at this non-charging & battery issue, I would like to ask this question on the D838pro. My battery won't charge even after 24 hours of charging. The red LED blinks thru the whole process. The LED did not turn on to orange or green. It is the battery problem because my spare battery works well. I would like to know what is wrong with the battery as I am willing to strip down the battery. Could it be the battery circuit or wiring that had fired?
Click to expand...
Click to collapse
Never tried stripping down a battery, some things... well, just don't seem worth it. However as a learning exercise it might be interesting. Without lots of testing on a good battery with a multimeter then I have no clue what the readings should be between all the contacts. (Now there's a little job for you) It is as likely the internal structure of the battery is screwed as it is to be a wiring problem.
If you solve it you can certainly report back here
Mike

HD2 Died - Power Problem

Thats right.. last night i left my Leo charging, today when i woke up i noticed that the battery level was very low so.. i unplugged it and plugged it again, noticed that the orange led wasnt lighting up, neither was the phone charging.
The phone gets very very very hot when plugged to charger or USB port on my computer and does not charge at all.
Tried it all, left it all day long with the battery out of the phone, tried charging without it in.. and nothing..it just gets very hot where the connectors (pins) make contact with the battery.
Now im trying to charge the battery on a cradle to flash it with stock rom and SPL to get it to warranty..
Any of you guys has any thoughts?
I see i posted in the wrong section.
Thank u mod
Do you always charge via usb into pc? Is your cradle plugged into the wall or pc? I don't know if you have done this, probably so, but check in windows settings->system->Power and inside the battery tab see if the "When phone is on, do not charge the battery when connected to a PC" is checked.
Sean3 said:
Do you always charge via usb into pc? Is your cradle plugged into the wall or pc? I don't know if you have done this, probably so, but check in windows settings->system->Power and inside the battery tab see if the "When phone is on, do not charge the battery when connected to a PC."
Click to expand...
Click to collapse
Yeah.. it crossed my mind to check for it, and that option is unchecked.
Though the charging "orange" led doesnt turn on even if the phone is off.
I usually charge it via usb->pc, allthough i tested with the wall charger and nothing.
I suspect it must have been a power surge that burnt in some way the PBC of the "charging module..thing"
Thanks for the suggestion
i'd check that none of the pins for the battery are in contact with each other if there is heat in that area.
Ok, I'm assuming then that the phone works, but just has low battery at the moment. If that's the case then it doesn't appear to be the battery or the leads. Any chance it's the cable? That of course assumes your using the same one with the cradle. I ask because my device didn't come with a wall charger, just a usb cable so I had to get a few extra plus a wall plug-in with a usb port.
Jack E said:
i'd check that none of the pins for the battery are in contact with each other if there is heat in that area.
Click to expand...
Click to collapse
Yep already checked it..although if it was something wrong with the pins the phone wouldnt turn on.. i dunno
Sean3 said:
Ok, I'm assuming then that the phone works, but just has low battery at the moment. If that's the case then it doesn't appear to be the battery or the leads. Any chance it's the cable? That of course assumes your using the same one with the cradle. I ask because my device didn't come with a wall charger, just a usb cable so I had to get a few extra plus a wall plug-in with a usb port.
Click to expand...
Click to collapse
I have a car charger also.. and nothing.
Your leo didnt came with a wall charger?
BillReed said:
I have a car charger also.. and nothing.
Your leo didnt came with a wall charger?
Click to expand...
Click to collapse
Weird, but unfortunately it didn't. I think being in the US and getting the device from Telstra in Australia may be why I didn't. Well, if it is a hardware problem and you can't get it to charge from the device, I believe you can get a cradle that will allow you to charge the battery independant of the phone. I know it's not the best option on the planet, but it would get your battery where it needs to be to flash and confirm whether or not it's a charging issue with the battery itself.
Come to think of it, this did happen to me several weeks ago. I plugged the phone in before bed as usual and noticed the charging light didn't go on and the battery drained overnight from about 60% to 15%, which it shouldn't have done. Not in standby at least. Soft-reset the next day fixed it. It hasn't done it since. I was installing a bunch of things that evening, which may have been what did it.
I had a same problem with my hd2 and by some miracle and few days of pain
it workd again...and it workd about 5 days and same thing happend al over again...and I think I have solution!
It may be stupid but it work for me...
try to connect your hd2 to charger but without battery and then insert the battery and it should start up your phone and charging...
I apologizes for my poor english
mikelebrat said:
I had a same problem with my hd2 and by some miracle and few days of pain
it workd again...and it workd about 5 days and same thing happend al over again...and I think I have solution!
It may be stupid but it work for me...
try to connect your hd2 to charger but without battery and then insert the battery and it should start up your phone and charging...
I apologizes for my poor english
Click to expand...
Click to collapse
I'll try that when i arrive home..

Hd2 not getting charged!!!! Pls help me

Hi Folks,
My HTC HD2 Android not getting charged either by a wall charger or usb via my pc... i dont what happened suddenly it got turned off due to low battery and when i pluged it for chrging its not showing orange LED notification of charging. when its off and plugged in Orange LED blinked once and Phone got switched on. And when its connected to PC for abt 3 mins it will show charging and after that it shows discharging and battery drains when it shows it discharging . pls help me out coz i dont want to loose my Leo .
Thanx in advance,,,,
Check the pins at the phone which connects to the battery. Sometimes they are deformed and this cause the charging/not charging problem.
But... in this case I don't think this is the problem, because this problem should not affect direct charging from usb cable.
Anyway check them just for sure!
Thanks VDodi
VDodi said:
Check the pins at the phone which connects to the battery. Sometimes they are deformed and this cause the charging/not charging problem.
But... in this case I don't think this is the problem, because this problem should not affect direct charging from usb cable.
Anyway check them just for sure!
Click to expand...
Click to collapse
I tried diff cables but its the same...
Magldr doesn't support charging when phone is off.
Nigeldg said:
Magldr doesn't support charging when phone is off.
Click to expand...
Click to collapse
so if your phone dies how do you get it to charge?
Wdustin1 said:
so if your phone dies how do you get it to charge?
Click to expand...
Click to collapse
Best way is not to let it run out
However, normally it will have enough charge left once it dies to boot up far enough to start charging. If this is not the case, then you have to cut open a USB cable and use the red and black wires to charge the battery. I have not had to do this and am unsure as to how to do it but there are tutorials. It seems simple enough.
Sarathdna said:
Hi My HTC HD2 Android not getting charged either by a wall charger or usb via my pc... i dont what happened suddenly it got turned off due to low battery and when i pluged it for chrging its not showing orange LED notification of charging.
Click to expand...
Click to collapse
Consider, as was previously suggested, a cable connection issue.
While you do not currently have the luxury of looking at your status icons, I have found that, on occasion, when I plugged in the phone to charge, the status icon indicated a USB connection, rather than a charging icon. Unplugging the cable and re-inserting the cable fixed it.
Note that new high quality cables can exhibit the same issue.
You have nothing to lose... Give it a shot.
Good luck.
----
Sent from my ICS HD2 with XDA Premium
Nigeldg said:
I have not had to do this and am unsure as to how to do it but there are tutorials. It seems simple enough.
Click to expand...
Click to collapse
Take out battery, plug chopped up USB cable into wall charger, use fingers to hold red to + black to -, count to twenty, battery in phone, phone into bootloader, real charger cable into phone and wall charger, leave 10 mins, reboot into android. (Can charge all the way in bootloader, but it seems slower than when android is running.)
samsamuel said:
Take out battery, plug chopped up USB cable into wall charger, use fingers to hold red to + black to -, count to twenty, battery in phone, phone into bootloader, real charger cable into phone and wall charger, leave 10 mins, reboot into android. (Can charge all the way in bootloader, but it seems slower than when android is running.)
Click to expand...
Click to collapse
By 'tutorials on how to do this' I basically meant your posts
As previously said if you're using magldr you need to be booted into Android before the phone will charge. You can try to warm the battery up in your hands to squeeze the last bit of power out of it to boot up. Or there are standalone hd2 battery charges you can buy from eBay that charge your battery outside of the phone, they're pretty cheap.
Sent from my HTC HD2 using XDA App
As Samuel said you can charge phone in bootloader. Just try!
Had to buy external charger
item # M00366 this charger was cheap has led's that change from red to blue as the battery charges and has a usb port so you can charge a battery in phone at the same time.
I'd been alternating tween an extended battery and the original when my HD2 started discharging while plugged in. same batteries and nearly a year of typhoon's excellent ROM progression then wham dead batteries....

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