Database Users

Really annoying problem...

Hey guys.
I'm experiencing some problems with my Touch HD. When I get it to start I'm really happy with it and every program runs as it should.
My problem is the battery or something like that. I can have the battery power at 70% one second and the next the phone is telling me to either charge the battery or the device will shut down. I try to start it again but at the start screen it says Battery level to low, your device will shut down.
When I try to charge it the LED under the power button will show a solid amber light, telling me that it's charging, for about 7-9 seconds and after that it will either start flashing between amber and green light or just turn off.
I've tried having it like that over night and try to start the phone in the morning and the same message appear on screen, "Warning! Battery level to low! Your device will shut down!"
Read in some other post about someone who had a similar problem, but not quite the same, and that was resolved by removing the battery, plug in the USB cable for a few seconds, disconnect everything and then put the battery back in and start the phone. This works for me about 30% of the time. When it works the battery shows about 60-80% power.
I've tried a hard reset and I've tried to contact HTC without any success. Any suggestions from you guys, you seem to know almost everything there is to know about these phones.
Thanks.
/Markus

Have you tried keeping the battery out for a day?
When I got my phone, the first 7 charges I turned the phone off and charged it all the the way up (to get the calibration accurate). Now the battery life is excellent, I can use it for couple of days without charging.
You should try returning the phone, seems it is fine software wise. Can you use the phone with the charger in? If yes, then there is probably something wrong with the battery or the hardware that is interacting with the charging.

I've tried keeping the battery out for about 24 hours but it didn't help. I can't start the phone when I have it plugged to the charger. I'm going to return it today and see if they can just exchange the phone in store or if they need to ship it somewhere to be repaired
Thanks anyway.

Sounds like a defective battery to me...

That's a good idea, better to get a new one.

crapforbrains said:
Hey guys.
I'm experiencing some problems with my Touch HD. When I get it to start I'm really happy with it and every program runs as it should.
My problem is the battery or something like that. I can have the battery power at 70% one second and the next the phone is telling me to either charge the battery or the device will shut down. I try to start it again but at the start screen it says Battery level to low, your device will shut down.
When I try to charge it the LED under the power button will show a solid amber light, telling me that it's charging, for about 7-9 seconds and after that it will either start flashing between amber and green light or just turn off.
I've tried having it like that over night and try to start the phone in the morning and the same message appear on screen, "Warning! Battery level to low! Your device will shut down!"
Read in some other post about someone who had a similar problem, but not quite the same, and that was resolved by removing the battery, plug in the USB cable for a few seconds, disconnect everything and then put the battery back in and start the phone. This works for me about 30% of the time. When it works the battery shows about 60-80% power.
I've tried a hard reset and I've tried to contact HTC without any success. Any suggestions from you guys, you seem to know almost everything there is to know about these phones.
Thanks.
/Markus
Click to expand...
Click to collapse
switch off wifi, install Advanced Config, select all power management enabled
and try again. i also had the situation that my hd took 1550 mA. so the battery was sucked empty within several hours. now everything runs perfect...

Have exactly the same problem
I have exactly the same problem. One moment the phone works and charges fine and the next it shows irratic battery levels and eventually needs to be shut down. Following the shutdown you get the 'Battery level too low' message on startup, right after the Smart Mobility screen. In my case I think the problem mostly started when the phone was either just connected to a PC using the sync cable or when trying to top-up the charge using the wall charger. I also noticed that when the problem appears the plug symbol would appear (indicating it is charging) or sometimes not and then when checking the battery level, the indicators would actually go down sometimes losing 2 or 3 at a time until there is only 1 left and the phone says it needs to shut down. Pluging in the wall charger does not help as the LED indicating the phone is charging only stays on for a few seconds.
Now, I had many trials with removing battery, sim card, memory card or any of those in combination and sometimes these seem to work, but I think the key is the temperature of the phone. Every time I went to the car to drive home, where it was cold, the phone would start charging again, when just before that it would not react to anything all the time I was in the warm office.
I have now contacted HTC and am sending it to their repair centre tomorrow. Hopefully this is recognised as a fault and I will get a replacement. BTW, they arranged for a free courier pickup. Not bad, but the key for me is that the phone is being replaced as I really like the phone.

Update: Got a replacement after 1 week
Got my replacement phone today and hope that this time I have no further problems. I also had to return my previous one with a screen problem (see my post here http://forum.xda-developers.com/showthread.php?t=439410&page=2).
Everything went quite smootly and I liked the offer of a free of charge UPS pickup, so the only complaint I really have is that HTC send me a new phone but no replacement screen protector. Just the original screen sticker (the one with some writing on it) had been stuck on. It was in a bit of state like it had been taken off and put back on several times. I just called them to send me a replacement screen protector, but I don't hold my breath to get one. Probably end up buying it from the website.

Sign of bad battery?

Have a TMOUS purchased in May. Latest stock rom/radio. When the battery is super low it goes through the process of shutting down - but when I plug it into the charger the phone will boot instead of staying shut down and charge. Will attempt to boot then go into Sense then shut down again and do the same process all over again. The only way to stop it is to quickly power down and it will stay down and charge. In any of the situations the phone appears to be charging.
Is this a problem with the ROM/Hardware or is something going on with the battery? Have an 8GB SD card with Android (no boot loader) and thats pretty much it.
Any advice would be appreciated.

I doubt that your battery is gone bad, but there are chances, try to condition your battery

Its just a little strange that the when the supposedly dead phone is plugged into a charger it boots up without pressing the power button. Don't think thats normal. Also when plugged into a charger when the battery is "dead" or near dead it should boot up and charge. This one doesn't - it boots - shows an LED charge light and then powers down and reboots. For some reason the battery with such a low charge can't power the phone and charge at the same time.
Will attempt to do a hard reset - maybe HD2 Tweak or something else did something to the registry and try it again. Since its under warranty will request another battery and take it from there. Don't think anything is wrong with the phone's hardware because it functions flawlessly.

stim141 said:
Its just a little strange that the when the supposedly dead phone is plugged into a charger it boots up without pressing the power button. Don't think thats normal. Also when plugged into a charger when the battery is "dead" or near dead it should boot up and charge. This one doesn't - it boots - shows an LED charge light and then powers down and reboots. For some reason the battery with such a low charge can't power the phone and charge at the same time.
Will attempt to do a hard reset - maybe HD2 Tweak or something else did something to the registry and try it again. Since its under warranty will request another battery and take it from there. Don't think anything is wrong with the phone's hardware because it functions flawlessly.
Click to expand...
Click to collapse
If the battery drains and shuts off because it's out of juice, it WILL turn back on as soon as you plug it in, but it shouldn't keep rebooting after that...
Also if it's just shutting down on you in Android without warning when it's low, you need to condition your battery in Android so that it has the correct batterystats info.

No something is wrong. Ran it out of juice in WM this afternoon. Got the error message let it go. Went down and shut off. Plugged it into a car charger USB/cig adapter. Powered up go to tmobile screen/radio code then animation - rebooted did the same thing without touching it a few times then shut off - light led for charging did not appear.
Pulled battery - when charger disconnected - plugged charger - red light no reboot. Tried it again - same results with a hitch - it froze when it was charging - accessed internet explorer then it did a hard freeze - had to press reset button.
Don't know whats going on at this point - it shouldn't have done the freeze. So I'm going to experiement - pull the SD card (has Android on it) and try it again without the card. Try another card, try another charger and see - if I get the same results its either the phone or battery. When I have a charge greater than 5% there are never any problems. Only when battery level 0-1%.

stim141 said:
No something is wrong. Ran it out of juice in WM this afternoon. Got the error message let it go. Went down and shut off. Plugged it into a car charger USB/cig adapter. Powered up go to tmobile screen/radio code then animation - rebooted did the same thing without touching it a few times then shut off - light led for charging did not appear.
Pulled battery - when charger disconnected - plugged charger - red light no reboot. Tried it again - same results with a hitch - it froze when it was charging - accessed internet explorer then it did a hard freeze - had to press reset button.
Don't know whats going on at this point - it shouldn't have done the freeze. So I'm going to experiement - pull the SD card (has Android on it) and try it again without the card. Try another card, try another charger and see - if I get the same results its either the phone or battery. When I have a charge greater than 5% there are never any problems. Only when battery level 0-1%.
Click to expand...
Click to collapse
Your battery pins aren't bent are they? (The little guys on the phone side that smash down when you insert the battery)

No, they are fine. I did call T-Mobile this afternoon and spoke to a level 2 tech - they think the battery is bad. Under warranty and have to call HTC tomorrow morning.
The phone does charge and does get to 100%. Drain in Windows seems fine and uniform but it does drop quickly once I get to about 20%.
Because of the reboot issue I think one of the cells is bad. Doesn't seem to want to trickle charge when the battery is that low. Tries to reboot - but can't get enough juice to sustain itself. Should just bypass through the battery as its charging. Either its the battery or somehow the charging circuitry is bad - who knows - with a new battery if it still does it then is the phone's hardware.
Will stop using Android for a while until this gets worked out - although I prefer the browser over WM 6.5.

stim141 said:
No, they are fine. I did call T-Mobile this afternoon and spoke to a level 2 tech - they think the battery is bad. Under warranty and have to call HTC tomorrow morning.
The phone does charge and does get to 100%. Drain in Windows seems fine and uniform but it does drop quickly once I get to about 20%.
Because of the reboot issue I think one of the cells is bad. Doesn't seem to want to trickle charge when the battery is that low. Tries to reboot - but can't get enough juice to sustain itself. Should just bypass through the battery as its charging. Either its the battery or somehow the charging circuitry is bad - who knows - with a new battery if it still does it then is the phone's hardware.
Will stop using Android for a while until this gets worked out - although I prefer the browser over WM 6.5.
Click to expand...
Click to collapse
Def sounds like a battery issue then, if the pins aren't bent because that is the biggest symptom of bent pins.

HTC not charging after empty battery

This morning my HD2(7) was totaly empty. The power button did not do anything and the phone won't start up. When I hooked it up to the charger, the red led did not come up and the phone was not charged at all.
I tried to do a soft reset, but nothing happend. Some posts on this forum suggested a hard reset, but I did not want to loose all content on my phone.
It seems that the real solution is very simple. Just connect the phone to a charger, remove the battery completly and then place the battery back in the phone. The HTC will now start up and begin to charge.
So, just a waring, do not hard reset when you phone stops charging...
Cheers, Rene

Funnily enough I put my phone on charge last night, forgetting that I'd also switched it off... Came to it this morning and remembered about the charging issue when switched off. Tried to switch the phone on and nothing... So I went to change the battery with the wife's HD2, but managed to mix up the batteries and found that my phone would switch on afterall and it was also fully charged. The wife had her's on charge overnight as well, so both batteries were showing as being full...

Charging issue has been fix up in the MAGLDR 1.13 version

knaar00 said:
This morning my HD2(7) was totaly empty. The power button did not do anything and the phone won't start up. When I hooked it up to the charger, the red led did not come up and the phone was not charged at all.
I tried to do a soft reset, but nothing happend. Some posts on this forum suggested a hard reset, but I did not want to loose all content on my phone.
It seems that the real solution is very simple. Just connect the phone to a charger, remove the battery completly and then place the battery back in the phone. The HTC will now start up and begin to charge.
So, just a waring, do not hard reset when you phone stops charging...
Cheers, Rene
Click to expand...
Click to collapse
There is no doubt that this is sensible advice, but there may be an overlap with another issue here.
I have noticed - and it could just be specific to my phone - that if the phone gets to the point where it shuts itself down to conserve power, it will often not restart from the power on button and only pulling the battery will wake it up. This seems to be a 'feature' of WP7 on HD2.
Interestingly, on several occasions where the battery has been fully charged (and still plugged in) the phone will not start from power on if I do a shut down - I tried it less than an hour ago after making a couple registry tweaks and only pulling the battery would persuade a fully charged phone to restart. It would be interesting to know if others are finding the same.
Where the battery is seriously discharged, it can take several cycles of pull battery - boot phone - phone decides it has insufficient battery and shuts down - pull battery - boot phone...before WP7 decides it has had enough juice trickled back into it to be able to charge - sounds crazy, but there you go.
MAGLDR v1.12 doesn't support charging, which doesn't help. I'm going to try v1.13 to see if agarp is correct - here's hoping.
Update: I don't think MAGLDR113 supports charging directly but I believe it has something built in to prevent a plugged in phone running down the battery. Not sure about exactly what, but it suggests something about booting the phone if plugged in and battery is at critical levels.

[Q] black screen and white stripes (CM9)

Update4: (14.01.2012 1244): This method didn't work. I sent my Defy back to Amazon and they repaired it under warranty
They will send it back to me next week. It seems that it was a production failure.
Anyway, thank you very much for your help cengiran!
Hi Guys!
I do have a big problem with my Defy.
I updated the CM9 onto the newest version and had to activate my google-acc. I didnt finish the smartphone registration and put my Defy to the side. Today morning the battery was empty and I reloaded the battery. After that I turned the device on but the only thing it shows is a black screen with stripes (even in cwm and bootloader). Does anyone know how to fix my Defy??? The Defy boots completely but the screen remains crappy ;(
Please help me!!!
With best regards
HT
Edit1: (27.12. 1421): New day, same problem ;( Still found nothing helpful...
Update: (27.12. 1736): Flashed a new fixed sbf with RSD Lite. Still the same problem. Could it be a hardware problem??? LCD-Display broken or stuff like that? Didnt throw the phone through the room like others (^^);
Update2: (29.12. 0801): Error still remains... Is their anyone who had the same problem or who can help me? Do I have to replace my Defy? Might there be problems with Amazon (warranty) because of root and stuff like that?
Update3: (30.12. 2217): Now trying the tip by cengiran:
cengiran said:
hi there,
i have the same issue but not due to CM9 installation but due to hardware issue. judging by your writing, this has nothing to do with software and so hopefully this helps.
My screen is also black at boot with some part of it are stripes (and some bad white and blue square w/ noise) and looks like a broken LCD monitor.
This is due to hardware malfunction (probably your battery went bad) in my defy the battery have some water damage and somehow it screws up the voltage regulator or the grounding part, but does boot with the correct screen using some techniques on every boot.
Try this solutions:
1. completely discharge your battery, take it off, hold the phone power button for 30 seconds to make sure every power stored in phone is out. Put the battery back on and connect the charger while the phone is still off. DO NOT turn the phone on. Your screen will look all mess up when showing the green battery, wait until 3hours and take a look at your screen again. In my case, the screen showing the the battery charging image is clear again after i did this. - this is to make sure that your screen is actually okay. Try turning your phone now and see...if its still bad then go to step 2.
2. turn phone off, open the battery case. Connect phone to charger again without turning it on. The phone will do its regular boot up until showing you the battery icon again. when the battery icon is there, PULL the BATTERY out of the phone (the charger cable is still connected to the phone). the phone will reboot itself with the correct screen usually, if it doesnt boot itself, quickly pull charger cable and reconect it again (with the battery still detached from your phone).
mind you if you get to the okay screen, this will not boot your phone, this will bring you as far to the battery icon with a question mark (we know for sure is just battery issue now). regardless screen is okay or not, proceed to step 3.
3. turn off phone, battery out of the phone, and press the power button for 30 seconds. release power button and re-insert battery and boot. (usually still bad but this is to ground any left voltage in there). after it boots (with the bad screen, if the screen is okay then proceed to using your phone like usual) before the LED lights blinks (the 2nd.init lights) pull out battery, press the power button for 2 seconds, re- insert, and boot. repeat this as necessary until it boots with an okay screen.
tips:
battery empty is for step 1 only, steps 2 and 3 needs power form the battery.
You can actually go to step 3 if you wishes, but my experience is by using step 2, it will talke less retry until i boot with the okay screen (i need to do this everytime i restart the phone mind you, so its a daily thing) .
the LAST tip: there no rules of thumb on how many retries it needs, if you have been retrying for 20 minutes on step 3 with no avail, revert back to step 1 or 2 and retry step 3. If this is sill fails, then you might need to consider purchasing a new battery, or take it for a repair!
Im still waiting for my new battery, but now it only takes me 5-6 tries before it boots correctly, in the apst it took me 15 minutes of constantly retrying so be patient, but still need to set a line when to give up!
Hope this helps and good luck
how does it go?
to completely discharge your battery is tricky...and actually not recommended because i heard our kind of battery should never went completely gone, it can mess up the battery capacity. i suggested it because thays what i did and in this case, battery cost much less then actual repair,,call it collateral if you will.
heres what i did to completly discharge it...after the phonse turned off automatically due to battery running out, it still have around 2% in it so reboot and enter 2ndinit/boot loader. let it stay there until the phone turned off on its own again. in 2nd init, the phone wont turn off screen so it will continue using whatever is left in the battery. keep n mind that even at very small amount of juice left, this process can takes up 2hrs or more.
Click to expand...
Click to collapse
...can't post a photo of the screen...
Update4: (14.01.2012 1244): This method didn't work. I sent my Defy back to Amazon and they repaired it under warranty
They will send it back to me next week. It seems that it was a production failure.
Anyway, thank you very much for your help cengiran!

push10char

pushagain;(

hi there,
i have the same issue but not due to CM9 installation but due to hardware issue. judging by your writing, this has nothing to do with software and so hopefully this helps.
My screen is also black at boot with some part of it are stripes (and some bad white and blue square w/ noise) and looks like a broken LCD monitor.
This is due to hardware malfunction (probably your battery went bad) in my defy the battery have some water damage and somehow it screws up the voltage regulator or the grounding part, but does boot with the correct screen using some techniques on every boot.
Try this solutions:
1. completely discharge your battery, take it off, hold the phone power button for 30 seconds to make sure every power stored in phone is out. Put the battery back on and connect the charger while the phone is still off. DO NOT turn the phone on. Your screen will look all mess up when showing the green battery, wait until 3hours and take a look at your screen again. In my case, the screen showing the the battery charging image is clear again after i did this. - this is to make sure that your screen is actually okay. Try turning your phone now and see...if its still bad then go to step 2.
2. turn phone off, open the battery case. Connect phone to charger again without turning it on. The phone will do its regular boot up until showing you the battery icon again. when the battery icon is there, PULL the BATTERY out of the phone (the charger cable is still connected to the phone). the phone will reboot itself with the correct screen usually, if it doesnt boot itself, quickly pull charger cable and reconect it again (with the battery still detached from your phone).
mind you if you get to the okay screen, this will not boot your phone, this will bring you as far to the battery icon with a question mark (we know for sure is just battery issue now). regardless screen is okay or not, proceed to step 3.
3. turn off phone, battery out of the phone, and press the power button for 30 seconds. release power button and re-insert battery and boot. (usually still bad but this is to ground any left voltage in there). after it boots (with the bad screen, if the screen is okay then proceed to using your phone like usual) before the LED lights blinks (the 2nd.init lights) pull out battery, press the power button for 2 seconds, re- insert, and boot. repeat this as necessary until it boots with an okay screen.
tips:
battery empty is for step 1 only, steps 2 and 3 needs power form the battery.
You can actually go to step 3 if you wishes, but my experience is by using step 2, it will talke less retry until i boot with the okay screen (i need to do this everytime i restart the phone mind you, so its a daily thing) .
the LAST tip: there no rules of thumb on how many retries it needs, if you have been retrying for 20 minutes on step 3 with no avail, revert back to step 1 or 2 and retry step 3. If this is sill fails, then you might need to consider purchasing a new battery, or take it for a repair!
Im still waiting for my new battery, but now it only takes me 5-6 tries before it boots correctly, in the apst it took me 15 minutes of constantly retrying so be patient, but still need to set a line when to give up!
Hope this helps and good luck

Hi cengiran,
thank you very much for your help. I will try this immediately. The only problem I do have that my battery doesn't want to go empty XD
There are so many people who want their battery to last as long as possible and now I want to get it empty a quick as possible XD Irony
Since 26th December 1004 pm my Defy runs with one single battery charge XD I think thats a pretty good battery life for a smartphone ;D
If your tips don't work I will sent it back to Amazon and hopefully they send me a new one or repair my old one.
Thanks again and I will post if your method works.
With best regards
HT
P.S. Amazing that this thread is the 1st Google search result for this problem XD

how does it go?
to completely discharge your battery is tricky...and actually not recommended because i heard our kind of battery should never went completely gone, it can mess up the battery capacity. i suggested it because thays what i did and in this case, battery cost much less then actual repair,,call it collateral if you will.
heres what i did to completly discharge it...after the phonse turned off automatically due to battery running out, it still have around 2% in it so reboot and enter 2ndinit/boot loader. let it stay there until the phone turned off on its own again. in 2nd init, the phone wont turn off screen so it will continue using whatever is left in the battery. keep n mind that even at very small amount of juice left, this process can takes up 2hrs or more.

Finally! My battery is empty
Now I try your method and see what happens

This method didn't work. I sent my Defy back to Amazon and they repaired it under warranty
They will send it back to me next week. It seems that it was a production failure.
Thanks anyway!
With best regards
HT

cengiran said:
This is due to hardware malfunction (probably your battery went bad) ...
Try this solutions:
....
2. turn phone off, open the battery case. Connect phone to charger again without turning it on. The phone will do its regular boot up until showing you the battery icon again. when the battery icon is there, PULL the BATTERY out of the phone (the charger cable is still connected to the phone). the phone will reboot itself with the correct screen usually, if it doesnt boot itself, quickly pull charger cable and reconect it again (with the battery still detached from your phone).
mind you if you get to the okay screen, this will not boot your phone, this will bring you as far to the battery icon with a question mark (we know for sure is just battery issue now). regardless screen is okay or not, proceed to step 3.
3. turn off phone, battery out of the phone, and press the power button for 30 seconds. release power button and re-insert battery and boot. (usually still bad but this is to ground any left voltage in there). after it boots (with the bad screen, if the screen is okay then proceed to using your phone like usual) before the LED lights blinks (the 2nd.init lights) pull out battery, press the power button for 2 seconds, re- insert, and boot. repeat this as necessary until it boots with an okay screen.
Click to expand...
Click to collapse
Thanks a lot, a mix of these two works for me !
My problem arise after a month that I switched off defy for replacing it with a new smartphone (Xiaomi M2S).
I removed battery to force it to switch off, because I couldn't see anything.
I replaced the battery, I connected the phone to charger and after ten seconds (more or less) I removed the battery.
At this point I can see the Motorola logo. I've re-inserted the battery and it shows that it is at 97%.
For sure, the lcd is working

[Q] N7 BRICKED or Hardware fault? PLS Help!

Hi guys,
First of all these are my specs
N7 WiFi 16GB - 4.2.2 PA
Yesterday I tried to turn on my N7 but no go... so i thought: no battery since I didn't used my N7 for 2-3 days. I put it on charge a few hour but then when i tried to turn it on, again... nothing, so i tried to reset and hard reset but no effect... afte letin it a few more hour on charge I tried yet again and noting... i tried to keep power button presed for 30 sec, 60sec, etc... nothing...
Then i conected it to my PC and realized that nor W7 nor W8 recognized my device... It says "USB device not recognized" and also in device manager it says "Unknown device"
The thing is that when I Hard reset it conected to the PC it seems to restart since i get the "disconnected device" sound from windows and the then message "USB device not recognized" appears again...
I want to make this clear MY SCREEN NEVER TURNS ON! so i can't get in recovery or bootloader mode
Also fastboot doesn't see it
And yes I have the correct drivers on my PC on both W7 and W8...
So PLS...ANY Idea would be appreciated!!
Sorry for my English, I hope I was clear enough so that you guys understand my problem and what i did about it until now.

the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?

jt.one said:
the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?
Click to expand...
Click to collapse
As far as I can tell there is battery, so that is not the problem ...
Probably would be best to send it to warranty and see what they say ...
TY for reply

Za_RO_Maniac said:
As far as I can tell there is battery, so that is not the problem ...
Click to expand...
Click to collapse
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck

bftb0 said:
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck
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I was referring to this yes : "The thing you are seeing on the PC is probably APX mode."
So ill try your advises and come back with feedback !
TYVM