I woke up few days before while I was keeping my Galaxy S3 in the charger and found out no electricity, however, I found out that the green LED is blinking too fast. I pushed the power button to get it unlocked but it didn't respond. I had to hold the power button to force it restarting (as usual in such cases) after unplugging it from the charger (for any expected power return back to source), however, the phone turned dead. It is no more powering on, I replaced the battery with another one, I used the charger when power is back, another charger and connected the USB to PC and nothing happened! I left the battery off the phone for several hours but it didn't work, though.
The phone is now hard bricked but would this case be a system board failure (high voltage) or just the bootloader became malfunctioning? Since the phone is out of warranty, I opened up the case, removed the battery and opened it and removed the system board carefully (I'm a Computer Engineer and took my precautions). Then I used a multimeter continuity check to make sure there are any charges. I applied it to the power button and the multimeter read 1 with high sound while any other part to read very high value with no sound.
I had to send it to the official Samsung repair shop for checkup and they told me it might be a system board or software issue (they didn't explain but I understand something regarding the bootloader/EFS...etc) and a system board would cost about 330 USD!! I should know what happened by tomorrow and decided I won't replace the board at all in such a price but I'm assuming it's a hard-brick.
1- The LED was blinking before I had to force hold power button to get the phone restarted, hence I think it didn't get high voltage from power source.
2- Would force holding power button to get the phone restarted to cause a power damage to the motherboard?
3- Would force holding power button to get the bootloader malfunction?
4- The multimeter's continuity test I performed has any sign/meaning?
5- Since I have a custom ROM with root (I did installed tens of custom ROMs before with tens of root/unroot) and I didn't suffer a problem, my local stock Samsung firmware yet before MG4, would this be a problem if it's a bootloader issue for them to use JTAG or whatever to copy bootloader information? (Modems after MG4 has another store location for EFS rather than earlier once)
Any tips / feedback would be most appreciated.
Related
Hello!
I purchased this device some time ago and did not modify it in anyway (no rooting/flashing etc), just a stock device. After leaving it just laying around for about a month I tried to turn it on again and nothing happened. Connecting it to USB or wall charger just makes the power button red led blink intermediately.
Ive tried:
Reset button
Hard reset (vol up+vol down+power button)
Leaving it to charge overnight from the wall charger
Leaving it to charge overnight from USB
Singing to it
Specifics:
Stock firmware
Viewsonic VPAD7
Model#: VS13761
Any help would be appreciated (even as mundane as saying "its hardware is fried") etc, just want some clarify on what happened if their is no way to fix it.
Thank you in advance
Same problem
Even My Vpad 7 is having the same problem.
Can anyone shed light to the above problem?
Puia
Let's start with here -
http://forum.xda-developers.com/showthread.php?t=1015005 - post #6
Can you hold the "Volumn" Down button while pressing the Power button to get into FTM mode (diagnostic screen) - make a note of the basic information it displayed.
To exit/reset - you might need to use a small pin to press the Reset button at the lower bottom (left) of the device to get it to reboot.
If it does not reboot, power down or shut-off, does it stay on with only the RED LED flashing.
Probably the battery is dead or dying..
i am in a similar situation.. i can only see a Red flashing LED. the tab wont reboot, go into diagnostics or respond to any plethora of button press combinations..
For those of you reporting problems with your Vpad7 - apparently not responding & only flashing red LED, can you access/read/verify your device's FTM status? Does it show any sort of boot-up sequence at all (the 3 birds being the common one for official Viewsonic Vpad 7's?
Please re-check your mSD card - you have one inserted right? properly formatted and not corrupted, readable as a USB drive when taken out & connected to a PC? Try removing any Sim card or vice versa, insert one and try to boot it up? Has the battery being charged to 100% (using the stock 2.0A charger - typically take 4 to 8 hours)?
Since it's NOT rooted and has no custom recovery installed (right !) - even a successful effort to boot into Recovery Mode won't help at all, but, it will help if you can get into bootloader mode.
Still following ... if everything checked out up to now, it's very likely that your ROM was corrupted/damaged and you need to reflash the "correct" factory ROM (RUU or *.nb0 file) using the factory utility - as discussed in the referenced link .
If you think you know what you are doing and dare to try a DIY rescue by flashing it all over (got nothing to lose anyway, it's a brick - paperweight at this point) - see if you can access the viewsonic website and download the files directly ... if you cannot download/access the files, please post here or PM for possible alternatives from my private collection now in cloud storage (it's geared mostly for newer/ITE devices, however, but not all of it) Please be specfic with your model's firmware/build & other info as shown under FTM or see your factory carton's box for the technical info.
If it's under warranty, by all means, contact support & get RMA to return it for repair/exchange - in 2 to 3 weeks (4 ?) you will have it back in working order, good as new - no fuzz, no worries & the "brick" can fly in android again.
If none of these apply, another possibility for the advanced users daring to play in a "what do I get to lose at this point situation" - to try to connect it to PC and run ADB using terminal emulator, to try to bring it back to life or at least restart/reboot it. http://forum.xda-developers.com/showthread.php?t=1229804
Good luck & I will check back soon ...
Unfortunately, mine will respond to none of these. nothing shows up on the computer when i plug it in.. not a sound, nothing. i may try booting up my old linux partition and see what /var/log/messages has to say when i plug it in..
i have an inkling that the battery has completely died though.. its a smart battery so has a PCB attached to it. if this has gone then i doubt the tab will power up.. unfortunately, replacement batterys arent easy to source..
i will let you know how i get on with it later on tonight when the GF and Kid have gone to sleep so i have some peace to potter around the house..
cheers for all your help my friend!
Today I plugged it in to my computer.
There was a white flash on the screen then same thing happened again.
The red light will blink sometimes or it will stay on as if it is charging but nothing is showing up on the screen.
Does anyone know how to open up the viewpad 7 or a manual on how to change the battery?
Puia
Gtea said:
Today I plugged it in to my computer.
There was a white flash on the screen then same thing happened again.
The red light will blink sometimes or it will stay on as if it is charging but nothing is showing up on the screen.
Does anyone know how to open up the viewpad 7 or a manual on how to change the battery?
Puia
Click to expand...
Click to collapse
removing the back is rather simple.. run a credit card or any thin plastic along the edge starting at any corner.
good luck finding a replacement battery though.. i have searched high and low and cant find then for sale to the public that isn't a bulk order anywhere.
if you do find somewhere, please let me know..
Mine is an olivepad but I think the viewpad 7 and olivepad are the same hardware wise. (I may be wrong).
Maybe we can exchange the battery with another with the same voltage rating. And maybe higher mAh rating for better battery life?
It's already bricked so I don't mind experimenting a bit.
Here are some pictures I snapped.
vpad7 wont turn on
speakfor said:
Hello!
I purchased this device some time ago and did not modify it in anyway (no rooting/flashing etc), just a stock device. After leaving it just laying around for about a month I tried to turn it on again and nothing happened. Connecting it to USB or wall charger just makes the power button red led blink intermediately.
Ive tried:
Reset button
Hard reset (vol up+vol down+power button)
Leaving it to charge overnight from the wall charger
Leaving it to charge overnight from USB
Singing to it
Specifics:
Stock firmware
Viewsonic VPAD7
Model#: VS13761
Any help would be appreciated (even as mundane as saying "its hardware is fried") etc, just want some clarify on what happened if their is no way to fix it.
Thank you in advance
Click to expand...
Click to collapse
Open vpad7. Remove the only screw top near sim/micro sd. Remove Batt. connector for 15-30 seconds, put it back turn on and charge fully. (Its bcoz of fully discharged batt.)
Thanks
NAUMAN
---------- Post added at 11:48 PM ---------- Previous post was at 11:40 PM ----------
Gtea said:
Even My Vpad 7 is having the same problem.
Can anyone shed light to the above problem?
Puia
Click to expand...
Click to collapse
Open vpad7. Remove the only screw top near sim/micro sd. Remove Batt. connector for 15-30 seconds, put it back turn on and charge fully. (Its bcoz of fully discharged batt.)
Thanks
NAUMAN
Viewpad 7 won't charge battery and power on
Hi
Seems like it might be enough to just parallel connect a phone battery, with 3,7v to the battery PCB for a short period, to be able to charge the battery again.
Mogens
I disconnected the battery for 30s and assembled it back again, but the red flashing continues and it can't be turned on or charged.
Battery is over discharged.
1 - Open it and disconnect battery connector on mother board and reconnect and try to charge. If the battery percentage appears on screen appears and moving means its charging. Charge for few hours then turn on.
2 - Disconnect battery connector and charge it for 5 mins by using any 5V 1A power source for any mobile. Then put back battery connector and charge using original charger. If no other 5v 1 A source available, you have to cut the wire of same original charger and use +ve and -ve.
Regards
Nauman
Hi,
I recently helped a friend to change a broken digitizer glass screen on a Nokia Lumia 920 with RM-821. I ordered the new digitizer on ebay from china/hongkong so can't say anything about its functionality or possible compatibility issues.
When I started to change the digitizer the battery was very low. When I thought everything was done properly and the phone was put together again, and tried to start it, and nothing happened. I think I also tried a vol down+power button soft reset, and i remember i got some feedback from the vibrator but nothing from the screen. Well, I took it apart again and quickly discovered that the screen cable wasn't properly attached, so I attached it. (afterwards I saw somewhere that a low-battery soft-reset was a sure way to brick the phone...)
Next step, I've put the phone together and try to start it, nothing happens. Connect to charger, after some seconds a vibration, followed by the Nokia logo and then a screen with a flash and a cog-wheel (nothing animated). This is the state it is permanently stuck in. The only way to "start it" is to connect the charger and wait. If the charger is disconnected at the Nokia logo then it goes to the "no-battery"-icon and the powers off. At the flash-cogwheel it is possible to restart the phone by holding vol-down+power.
I let the charger be in for multiple hours, still the same thing. Took out the battery and charged it manually with external charger and some home-made wiring. That charger directly indicated that the battery was full with its indicator LED, but i still let it be for around an hour. Conclusion: battery is charged and most likely were charged in the phone.
I've tried to connect it through Nokia Software Updater for Retail 4.2.1, and the "my phone doesn't boot"-option doesn't find the phone after holding vol-down+power. (as described here http://www.wpcentral.com/suffering-spinning-cogs-issue-nokia-windows-phone-fix and other places)
No connection with Nokia Care Suite 5.4.119 either, using method as described here http://forum.xda-developers.com/showthread.php?p=47195500
SUMMARY
Since connecting the charger starts the phone, some part of the usb must work. The screen apparently work, don't know about the digitizer obviously. Since it is possible to restart from "flash+cog-wheel"-screen the side buttons aren't dead. Since removing the charger at the "flash-cog-wheel" screen doesn't power off the phone the battery does in fact work.
Naturally I can't rule out that I managed to break something on the mainboard when I changed the digitizer, even though I don't think so.
Hope somebody can help!
Before anyone says "this has been answered a million times" and posts a link, I want to assure you that I have read every single thing I can here on xda before posting.
The current status of my DNA is unknown to me. The device is rooted and has been for quite a while. It is S-OFF and has been for 3 years. The bootloader is UNLOCKED and has been for 3 years. The recovery is TWRP (most recent version for the DNA). The ROM it was running was santod040's GPE ROM for the DNA. It was running that rom for 6 months.
The device had no Sim card in it. It was used primarily as a backup device if I needed it and to play a few gaming apps that I have multiple accounts with (clash of clans). The device was used only on wifi for gaming. No apps were downloaded to the device prior to the device failure. No websites were visited prior to failure. 360 security was on the device as the primary antiviral app.
Symptoms that created current affliction:
None that I know of
Current affliction(s):
Will not power on
PC USB will not recognize (running Windows 10 - HTC Sync is NOT installed on my computer)
Will not hard reset
Will not boot to bootloader
Will not charge on AC power with original HTC charger (led flashes but never goes solid)
Will not charge on AC power with alternative triple shielded cables (led flashes but never goes solid)
Will not charge with any cable via PC USB (led flashes but never goes solid)
Possible remedies to affliction that have been attempted:
Volume down and power button simultaneously - FAILURE
Volume up and power button simultaneously - FAILURE
Both volume up and down with the power button simultaneously - FAILURE
Holding power button to reset manually - FAILURE
ADB - FAILURE
Boot to bootloader - Not possible for the moment
Boot to recovery - Not possible for the moment
Power up - FAILURE
The only thing it does is flash the amber led light when attached to AC or the PC via the charge cables (I have tried many)
Any and all help or solutions to at least get it back to recovery or the bootloader would be appreciated. I have the RUU 1.15 and a stock original backup saved to the PC. If I can get to at least recovery I should be able to sideload or oem lock the device and run the RUU. But for now I can't even get a screen.
Please help in any way you can and I thank you all in advance for any assistance rendered.
I don't know,but i can only assume that the battery is dead. You can buy new battery and try to replace it yourself. I bough battery replacement for my Droid DNA in case something happens from aliexpress : http://www.aliexpress.com/item/orig...rfly-droid-dna-htl21-bl83100/32260653385.html
HTC Droid DNA Battery Replacement Guide: https://www.youtube.com/watch?v=aFCvGcG0dVs
I give just a guess.
it seems, like cirios83 said, battery is "dead", i.e. battery is alive, but it self-locked by controller on very low voltage level.
why?
something makes battery drain. in my case it was unexpectedly died sound chip tf9887. time of replacing take over 1-2 hour in service (if they have an donor).
beffore going to service you can take off a back lid, disconnect the battery and measure resistance of supply chain. it must be close to infinity.
if it is not. you will know at least, that mainboard is in trouble.
this is example of one of many reasons why phone is "dead"
cirios83 said:
I don't know,but i can only assume that the battery is dead. You can buy new battery and try to replace it yourself. I bough battery replacement for my Droid DNA in case something happens from aliexpress : http://www.aliexpress.com/item/orig...rfly-droid-dna-htl21-bl83100/32260653385.html
HTC Droid DNA Battery Replacement Guide: https://www.youtube.com/watch?v=aFCvGcG0dVs
I give just a guess.
Click to expand...
Click to collapse
Since the phone is a uni body design, I have never looked into actually taking it apart. We do have a few places where I live that specialize in repairs and such, but I am not completely sure that the battery is the issue, it had one other problem that developed about a year and a half ago. That problem was the loudspeaker on the back no longer produced sound.
Perhaps there is a loose connection in the hardware itself causing it to no longer function. It's not a pressing matter as I do have another backup device or two. I'm just a little disheartened that it's no longer functioning.
My S9+ was acting quite weird this morning. Some apps continuously crashed or wouldn't start.
So i rebooted my phone (just from the normal power button menu) and then it went completely black.
It doesn't charge (or at least, it doesn't show it charging), it doesn't respond to forced resets and the screen is completely black.
The only thing it does, is briefly show a USB device when connecting it to a PC.
I've connected it to a Linux dev computer i have laying around and i see the following device connected briefly:
VID: 0x04e8
PID: 0x1234
It stays connecting longer if i hold the power button (about 8 seconds before power cycling).
The only things i could find online were some very old threads about Samsung's DNW mode, but nothing from this decade.
I think my Flash chip might be cooked, but i hope i'm wrong.
Anyone got any experience with this?
Update
I've sent it back to Samsung for repair under warranty.
The flash chip was gone. It started corrupting writes and finally it was so far gone that it couldn't load the bootloader.
They've replaced the main board and battery (probably because they tested it and saw it was going bad), that fixed it.
Hello,
My phone's battery was starting to have issues so I bought a new one and replaced it yesterday. I've done it recently on another phone (same model) so knew what I was doing when reassembling it, with the right adhesives and everything. Then I left it plugged for the night as this was advised by the new battery's seller. But this is what happens this morning when I try to turn it on:
- Phone doesn't vibrate when pressing the power button, neither when holding different combinations of Power + volume, etc.
- When I plug it this is what happens: imgur[dot]com/fByubwN The screen turns on as it would normally do, displays the 100% charged battery logo and then just dies (with the green led remaining). The only way to turn the screen on is to unplug and plug it again. But the phone itself isn't booting.
Any thoughts appreciated!
BassLH said:
Hello,
- Phone doesn't vibrate when pressing the power button, neither when holding different combinations of Power + volume, etc.
- When I plug it this is what happens: imgur[dot]com/fByubwN The screen turns on as it would normally do, displays the 100% charged battery logo and then just dies (with the green led remaining). The only way to turn the screen on is to unplug and plug it again. But the phone itself isn't booting.
Any thoughts appreciated!
Click to expand...
Click to collapse
I'd say that the battery is at fault. It can be two things:
- it is not correctly plugged (maybe the connector is not perfectly aligned, or one of the pins is bended)
- it is completely depleted, so won't charge at all.
Disconnect phone from charger and try to test voltage on the motherboard with a voltmeter. If you can't read anything, disconnect the battery and test it directly.
Personally I would say the first problem is more likely - a completely bricked battery is not that common.
Actually the battery was fine. I've opened it again and turns out I've kind of messed up with the flex connectors of the motherboard.
So I was able to boot it while it's open but as soon as I reassemble it, the controls are not detected anymore. It's a matter of millimeters, some parts probably don't sit properly, etc.
We spent some time on it with a guy at a local repair shop, the conclusion was that I had to get a new phone, or a new motherboard which is almost the same haha.
Thank you for taking the time to reply!