Develop Bugs

[Q] Dead phone after update, any way to bring it back

Hi guys, need very quick help from you, as I think I have bricked the phone which suppose to be a Christmas gift for may son. I was trying to revert phone from root and custom rom to stock. I've downloaded older OTA update (one of very first ones with android 2.2) an installed it in bootloader. Phone booted fine, and I went for official update. It showed to me there is update available to android 2.3. I have downloaded it and phone rebooted in to update mode. After progress bar gone to the end it disappeared and phone stayed in that update mode (logo with phone and green arrows shaped it to circle) for nearly half an hour. I though, some thing had to vent wrong so I decided to turn off phone, but power button gave no effect, so I pulled battery out for few seconds. After I have putted it back phone never turned on again. I mean is completely not responding. Pressing power button for even minute doesn't wake it up, it is not possible to go to the bootloader. There is no characteristic vibration when it turns on. Basically it behaves like there is no battery in socket but there is, and it is fully loaded as I charged it before updating. When phone plugged to AC or computer LED is not lighting as well whatsoever.
Please, can any one help with this one? I in rush as phone is a Christmas present for my son who lives in Italy and I supposed to ship this today to make it arrive b4 Christmas. This is why I can not spend to much time on searching forums.
Thank you

Check battery pins
hedeon said:
Hi guys, need very quick help from you, as I think I have bricked the phone which suppose to be a Christmas gift for may son. I was trying to revert phone from root and custom rom to stock. I've downloaded older OTA update (one of very first ones with android 2.2) an installed it in bootloader. Phone booted fine, and I went for official update. It showed to me there is update available to android 2.3. I have downloaded it and phone rebooted in to update mode. After progress bar gone to the end it disappeared and phone stayed in that update mode (logo with phone and green arrows shaped it to circle) for nearly half an hour. I though, some thing had to vent wrong so I decided to turn off phone, but power button gave no effect, so I pulled battery out for few seconds. After I have putted it back phone never turned on again. I mean is completely not responding. Pressing power button for even minute doesn't wake it up, it is not possible to go to the bootloader. There is no characteristic vibration when it turns on. Basically it behaves like there is no battery in socket but there is, and it is fully loaded as I charged it before updating. When phone plugged to AC or computer LED is not lighting as well whatsoever.
Please, can any one help with this one? I in rush as phone is a Christmas present for my son who lives in Italy and I supposed to ship this today to make it arrive b4 Christmas. This is why I can not spend to much time on searching forums.
Thank you
Click to expand...
Click to collapse
After reading what you said i think that you placed battery wrong. Check the pins inside the phone with battery pins.

whiperhack said:
After reading what you said i think that you placed battery wrong. Check the pins inside the phone with battery pins.
Click to expand...
Click to collapse
That was my first idea too but, no m8, battery is placed ok....

Try pressing volume down+power button for a while then leave the power button while still pressing the voulme key. You should boot into the bootloader.

if4ct0r said:
Try pressing volume down+power button for a while then leave the power button while still pressing the voulme key. You should boot into the bootloader.
Click to expand...
Click to collapse
Tried that too, still dead

Try connecting you DHD to the PC.
Download one of these Stock RUU's : http://shipped-roms.com/index.php?category=android&model=Ace
Run the installer from PC. See if it detects the device.

if4ct0r said:
Try connecting you DHD to the PC.
Download one of these Stock RUU's : http://shipped-roms.com/index.php?category=android&model=Ace
Run the installer from PC. See if it detects the device.
Click to expand...
Click to collapse
I understand I should not be worried that all of these RUU's are listed as for model: ACE?

Not at all. 'Ace' is the codename HTC gave to Desire HD/Inspire. Just choose the RUU that fits your location(i.e. WWE stands for WorldWide Edition).

if4ct0r said:
Not at all. 'Ace' is the codename HTC gave to Desire HD/Inspire. Just choose the RUU that fits your location(i.e. WWE stands for WorldWide Edition).
Click to expand...
Click to collapse
OMG! I was previously looking for stock roms and everytime I ended up on that site from your link I was annoyed that someone is giving a wrong link to roms for wrong phone. Silly me!
I am downloading right now.

if4ct0r said:
Try connecting you DHD to the PC.
Download one of these Stock RUU's : http://shipped-roms.com/index.php?category=android&model=Ace
Run the installer from PC. See if it detects the device.
Click to expand...
Click to collapse
No it says phone not connected (error[170])

hedeon said:
No it says phone not connected (error[170])
Click to expand...
Click to collapse
My idea is to double check again the battery position in the socket and if it is ok try to leave it 5 minutes alone on the AC adapter. If this will not give good results, go to the appropriate HTC representative.

when you connected it to your computer... did it ask you to install qload drivers?
if not, go into device manager on your computer, then plug in your phone. If you see an unknown device that shows as qload something or other, then sorry to say, its bricked.
The only way to recover it now is via jtagging or replacing the mainboard (which generally is what they do when you send it in for warranty repair)

whiperhack said:
My idea is to double check again the battery position in the socket and if it is ok try to leave it 5 minutes alone on the AC adapter. If this will not give good results, go to the appropriate HTC representative.
Click to expand...
Click to collapse
Yes, I thought about it as phone behave like it has no power at all. But this is not the case, as I have been flipping that and another battery in every possible position. And I know which one is correct as I can see where pins are in battery pocket. I left it alone under charging and other time with no battery at all hoping that will hard reset phone. No effect at all .
JSLEnterprises said:
when connected to your computer... did it ask you to install qload drivers?
if not, go into device manager on your computer, then plug in your phone. If you see an unknown device that shows as qload something or other, then its bricked, sorry to say
Click to expand...
Click to collapse
I had drivers previously installed. But I am not entirely sure are we talking about same thing as I don't know what QLOAD is. Anyway comp doesn't see any recognised or unrecognised device that could be my phone...
I am not worrying about damn phone as if it is hard bricked tech guys in service will not probably spot that it was rooted. So they will replace, or if not I will go to insurance company. Problem is it takes to much time, I wont make it b4 Christmas.
Thank you guys,
anyone has some other ideas? Please...

desperation bump

Sorry.. It really seems to be beyond software-repair, If it cannot boot in the bootloader or be recognized by PC there's really not much we can do. We need the device to start in some way.
Although one last thing that we haven't tried and can try is to see if it can be accessed via adb or fastboot. (Although I highly doubt it since the RUU also wasn't working).
I've attached the adb and fastboot files required to test that. Extract it, double-click on StartHere.bat and type "fastboot reboot" or "adb reboot". If it returns an error citing device not found then this too has failed.
(This probably wont work.. desperate action)
Another silly thing that might be tried is to try to put your phone on charging via a charger(not USB via PC) and then try to switch it on. Try normal switching, switching on to bootloader(volume down press)...
If these don't work then you really should give it to the repair center.. you're right that they wont probably realise that it was rooted and would probably change the main board.

if4ct0r said:
Sorry.. It really seems to be beyond software-repair, If it cannot boot in the bootloader or be recognized by PC there's really not much we can do. We need the device to start in some way.
Although one last thing that we haven't tried and can try is to see if it can be accessed via adb or fastboot. (Although I highly doubt it since the RUU also wasn't working).
I've attached the adb and fastboot files required to test that. Extract it, double-click on StartHere.bat and type "fastboot reboot" or "adb reboot". If it returns an error citing device not found then this too has failed.
(This probably wont work.. desperate action)
Another silly thing that might be tried is to try to put your phone on charging via a charger(not USB via PC) and then try to switch it on. Try normal switching, switching on to bootloader(volume down press)...
If these don't work then you really should give it to the repair center.. you're right that they wont probably realise that it was rooted and would probably change the main board.
Click to expand...
Click to collapse
Sigh... I got "waiting for device" forever in CMD... As you said, it's dead. Gonna send it to HTC in Monday...
Thank you all, appreciate your time

Hello hedeon,
I have the same experience today, as you state in the first post in this thread.
Did you, and how solve the problem?
Is there people with the same problem? This morning I receive notification about system update for my HTC Desire HD. The rest is exactly same problem from the top of this story = death + death + death.....

The problem is that you PULLED THE BATTERY WHILE UPDATING! Have some paitience. I switched on my DHD after 3 months and it needed updating. Takes around 20 mins to complete update
Sent from my HTC Desire HD A9191 using xda premium

GuyInTheCorner said:
The problem is that you PULLED THE BATTERY WHILE UPDATING! Have some paitience. I switched on my DHD after 3 months and it needed updating. Takes around 20 mins to complete update
Sent from my HTC Desire HD A9191 using xda premium
Click to expand...
Click to collapse
May be, but updating started with downloading, then resetting, and then green line was growing up to 1/3 of total size, and at that size stay more then 20 min. Then I try to to push every button, and every combination of buttons, and after 10 minutes more I had pull battery out.
Was it too impatient ?

What was the Android version before you rooted if you can remember and which tool did you use to root?
From what you wrote earlier, it asked you for a 2.3 update which means you probably flashed a Froyo RUU as stock, to bring the phone back to stock ofc.
However, if your DHD came with stock Gingerbread, flashing a Froyo RUU will most definitely screw the phone. I'm not sure if it's beyond repair atm or not, but if that was the case, even if you didn't mess with the battery, chances are the phone would never boot anyway.
Look into AAHK thread, I think there is a good how to there.

Bricked??

well i guess i keeep screwing my self over from one problem to another
but after i found a way to install a root without phone being able to load completely i think i bricked my phone here is why
my phone doesnt want to charge n when i try to power on it doesnt vibrate ... but i do see a dim red light when usb is on when its off it goes away n my laptop makes the noise when i connect it

Can you give us a more thorough explanation please. Don't understand properly.
Sent from a Time Lord, using his TARDIS.

Not much info given so i'll start with the most basic question.....
Have you got HTC Sync installed on your pc? And a battery of about 70%?
If you do try installing the latest RUU posted in a few topics under this page....

likewise im bricked

i tried to update my hboot but it frooze n my phone cut off and has no led light when i try to connect thru usb but i hear the beep on my laptop when i try to power nothing or try to boot into hboot nada is that good enough?

can i restore in android recovery? what update file in need to?

bumppppp please help

restore nandroid backup

firth999 said:
restore nandroid backup
Click to expand...
Click to collapse
He can't the device won't power on
Sent from my HTC_A510c using Tapatalk

I tried to unlock the bootloader on my device a little over a week ago - bricked it completely.
Had updated HBOOT and everything went fine - 'success' message appeared, etc.... Then my handset died and it wouldn't switch back on; it just flashed on and off repeatedly when powered on and I couldn't stop it, unless I pulled the battery. Couldn't access bootloader, couldn't do anything.
Took it to the local Three shop and they wouldn't touch it. So, I chanced my luck with HTC and was upfront about what had happened, i.e. I'd started the bootloader unlock process using their own HTC Dev software.
I've just got the 'phone back and they had to replace the motherboard. Haven't charged me for picking it up, via UPS, the repair OR sending it back to me, also via UPS.
I had hoped they'd ship back with the bootloader unlocked but they haven't! Doh.
Ah well, can't complain. HTC have definitely earned my gratitude, though, and I'll no doubt stick with them in future. I've just got to remove all the crappy pre-loaded software again.

so i basically have a bricked phone damn i needed it only phone i have n probably will have for awhile i had so much important #'s , notes , ext... im clueless to either tell HTC the truth or just buy another android phone idk :/

any ideas?? is it bricked or not i just need help why isn anyone paying this post any attention .. where is all the pros?

I'll swap your bricked wildfire s with a working desire z?

einstein.frat said:
I'll swap your bricked wildfire s with a working desire z?
Click to expand...
Click to collapse
if you would be willing to do so i would greatly apreciate that ... question is what would u do with a bricked wildfire s lol ?? but inbox me so we can work this out.. and what service?

bump!! still need an answer :/

Hello Im new here and Im noob in this stuff.I want to root my Htc wildfire S but im scared that Im going to brick it .So I have a few questions.
If mobile is bricked is it possible to restore old options.(is it possible to save it)
After few ROMS is it possible to restore everything like in begging if I dont like it.
Do you lose your guarantee after rooting.
Please someone help

Recovery
Take out your battery, put it back in Hold volume button down and press power button, does this do anything?

pxed322 said:
so i basically have a bricked phone damn i needed it only phone i have n probably will have for awhile i had so much important #'s , notes , ext... im clueless to either tell HTC the truth or just buy another android phone idk :/
Click to expand...
Click to collapse
You haven't even given details. Did you root? Custom ROM?
Try flashing an RUU.

My experience
This weekend I bricked my phone almost also.
Just installed a new version of my ROM to test and then it hanged or so.
When trying power on (normally and with volume down), nothing happened and I got the 3 vibrates.
I removed my SD card and then the phone would boot again
I really hope I don't get that anymore
BTW: my SD card is really old, around 2 years or more (so that may be the cause)

Format your SD card, then see if that works
Sent from my HTC Wildfire S A510e using XDA

[q] htc g2 not rooted semi bricked boot looping please help

Long story short my friend gave me a T mobile HTC G2 because it didn't turn on. I opened the phone to find the part where the battery connects to the phone came off the mother board so i solder it back on put the phone back together and turned it on. It booted up normal and came to the lock screen nothing worked the touch wasn't responding so i push power button to turn screen off and then again to turn it back on and the screen worked. I tried guessing his pattern five time and it didnt work it asked me to sign in to my Google account when the screen came up the phone rebooted and it kept doing it every time i turned it on. So i looked on xda how to restore it tried it and im not sure if it restored or not but it strated boot looping. I tried the flashing the pc10img.zip from the root of the sd card it usually says something like version to new or to old or something it didn't work. My phone is not rooted and i don't think usb debugging is on. Any info you guys want just ask. What can i do? How can i fix it? Please help

I'm going to take a guess, that if the battery connection to the motherboard 'broke off', then it's possible you have other physical issues such as the ribbon cable connecting the screen/digitizer to the rest of the phone.
If it were me I would have sent the phone into HTC for hardware warranty (which you can't do now since you soldered it.).
Can you provide some specific information about the phone, can you get into the boot loader, and if so what exact information do you have there? (USB debugging would be easily turned on under system settings, if you can get into it via the screen).

kbeezie said:
I'm going to take a guess, that if the battery connection to the motherboard 'broke off', then it's possible you have other physical issues such as the ribbon cable connecting the screen/digitizer to the rest of the phone.
If it were me I would have sent the phone into HTC for hardware warranty (which you can't do now since you soldered it.).
Can you provide some specific information about the phone, can you get into the boot loader, and if so what exact information do you have there? (USB debugging would be easily turned on under system settings, if you can get into it via the screen).
Click to expand...
Click to collapse
Thanks for replying i don't think anything else is wrong with the phone all the cables were fine. To begin with warranty was already finished. "Yes", i can get into the boot loader/H boot. I can turn on usb debugging because the phone doesn't boot all the way in to android. When you say information what exactly are you looking for?

helstonrampersad said:
Thanks for replying i don't think anything else is wrong with the phone all the cables were fine. To begin with warranty was already finished. "Yes", i can get into the boot loader/H boot. I can turn on usb debugging because the phone doesn't boot all the way in to android. When you say information what exactly are you looking for?
Click to expand...
Click to collapse
Mainly the info that shows up on hboot, and which recovery you have (or 'had') so that might be able to advise some additional steps.

helstonrampersad said:
Long story short my friend gave me a T mobile HTC G2 because it didn't turn on. I opened the phone to find the part where the battery connects to the phone came off the mother board so i solder it back on put the phone back together and turned it on. It booted up normal and came to the lock screen nothing worked the touch wasn't responding so i push power button to turn screen off and then again to turn it back on and the screen worked. I tried guessing his pattern five time and it didnt work it asked me to sign in to my Google account when the screen came up the phone rebooted and it kept doing it every time i turned it on. So i looked on xda how to restore it tried it and im not sure if it restored or not but it strated boot looping. I tried the flashing the pc10img.zip from the root of the sd card it usually says something like version to new or to old or something it didn't work. My phone is not rooted and i don't think usb debugging is on. Any info you guys want just ask. What can i do? How can i fix it? Please help
Click to expand...
Click to collapse
when you first had the phone it won't boot right? but when you tried fixing the battery connection thingy (sorry I don't know whats it called )
it booted and ran again?
have you tried doing a factory reset?
Power button+volume rocker down (volume down button) to boot into bootloader mode then do a factory reset maybe that would work ?
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OR
or sending the phone to HTC would help bud but you have to pay them for that if they get to fix it you got yourself a new toy!

kbeezie said:
Mainly the info that shows up on hboot, and which recovery you have (or 'had') so that might be able to advise some additional steps.
Click to expand...
Click to collapse
This is the boot loader screen that i see
VISION PVT SHIP S-ON
HBOOT-0.82.0000
MICROP-26.13.04.19_M
eMMC-boot
Apr 13 211, 14:51:54
Im pretty sure the phone was never rootded before

The Android Manual said:
when you first had the phone it won't boot right? but when you tried fixing the battery connection thingy (sorry I don't know whats it called )
it booted and ran again?
have you tried doing a factory reset?
Power button+volume rocker down (volume down button) to boot into bootloader mode then do a factory reset maybe that would work ?
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OR
or sending the phone to HTC would help bud but you have to pay them for that if they get to fix it you got yourself a new toy!
Click to expand...
Click to collapse
Its ok im not certain of what its called either but just to be sure its the part where the battery touches and it has metal prongs like. As for trying to restore it, i already tried didnt work it boot loops when i try that.

I don;t know what to do
helstonrampersad said:
Its ok im not certain of what its called either but just to be sure its the part where the battery touches and it has metal prongs like. As for trying to restore it, i already tried didnt work it boot loops when i try that.
Click to expand...
Click to collapse
ryin
sorry bro I'm no dev so I don't know that much when you were tryin to flash the "stock rom" did you flash the one for the G2 or the Desire Z?

The Android Manual said:
ryin
sorry bro I'm no dev so I don't know that much when you were tryin to flash the "stock rom" did you flash the one for the G2 or the Desire Z?
Click to expand...
Click to collapse
I still appreciate your help bro and i was trying to flash the stock rom for the g2, i made sure of it.

helstonrampersad said:
I still appreciate your help bro and i was trying to flash the stock rom for the g2, i made sure of it.
Click to expand...
Click to collapse
Would probably have to stick to the original Stock RUU update since you're S-ON (would need S-OFF for any kind of custom recovery, kernel, unsigned packages, etc), so would have to use a signed full package from T-Mobile, I don't know much bout that because I usually have my phones rooted and away from stock as fast as I can.
What stock rom did you find before? links?

kbeezie said:
Would probably have to stick to the original Stock RUU update since you're S-ON (would need S-OFF for any kind of custom recovery, kernel, unsigned packages, etc), so would have to use a signed full package from T-Mobile, I don't know much bout that because I usually have my phones rooted and away from stock as fast as I can.
What stock rom did you find before? links?
Click to expand...
Click to collapse
http://shipped-roms.com/index.php?category=android&model=Vision
Thats is the above link i used and i used all the ones that start with "PC10" I rename them to PC10IMG.zip so the phone can recognize it and it did. The only problem is that after it tries to install is say something along the lines of version is older or newer since i tried multiple packages. One package was going through the process and after that it didn't do anything, it didnt say failed or reboot or anything like that. Ive been trying to fix this for like a week and a half now. Ive even flashed custom PC10IMG.zip to see if it could help but nothing the furthest ive gotten is the phone boots for like 2 seconds the screen is blurry and the shuts off and there is an orange light in top right that wasn't lighting up before. Here are the links for the custom packages
http://forum.xda-developers.com/showpost.php?p=10583834&postcount=33
http://forum.xda-developers.com/showpost.php?p=10966727&postcount=63
Cant thank you enough for helping me this is really frustrating

kbeezie said:
Would probably have to stick to the original Stock RUU update since you're S-ON (would need S-OFF for any kind of custom recovery, kernel, unsigned packages, etc), so would have to use a signed full package from T-Mobile, I don't know much bout that because I usually have my phones rooted and away from stock as fast as I can.
What stock rom did you find before? links?
Click to expand...
Click to collapse
If what i explained above is not what you were referring to then let me know your way

helstonrampersad said:
If what i explained above is not what you were referring to then let me know your way
Click to expand...
Click to collapse
You would have to much it to your exact carrier/phone, Just flashing whatever you get your hands on can be very very risky.
For example for me being on T-Mobile with a T-Mobile branded G2, I would grab PC10IMG_Vision_TMOUS_1.19.531.1_Radio_12.21.60.09b_26.02.01.15_M2_release_149459_signed.zip from http://forum.xda-developers.com/showthread.php?t=971109
(noting the *.15 is the original radio my device was shipped with, though I've upgraded to the newer *.19)
I of course have no intention to returning to complete stock, but it's usually the only course of action for most people stuck with S-ON (and then would look into exploiting/unlocking/rooting again from there).

kbeezie said:
You would have to much it to your exact carrier/phone, Just flashing whatever you get your hands on can be very very risky.
For example for me being on T-Mobile with a T-Mobile branded G2, I would grab PC10IMG_Vision_TMOUS_1.19.531.1_Radio_12.21.60.09b_26.02.01.15_M2_release_149459_signed.zip from http://forum.xda-developers.com/showthread.php?t=971109
(noting the *.15 is the original radio my device was shipped with, though I've upgraded to the newer *.19)
I of course have no intention to returning to complete stock, but it's usually the only course of action for most people stuck with S-ON (and then would look into exploiting/unlocking/rooting again from there).
Click to expand...
Click to collapse
I know it can be risky but im desperate for a fix. Ill try the package you linked. I download it and rename it to PC10IMG.zip? Ill get back after im done if you have any other suggestion please let me know.

kbeezie said:
You would have to much it to your exact carrier/phone, Just flashing whatever you get your hands on can be very very risky.
For example for me being on T-Mobile with a T-Mobile branded G2, I would grab PC10IMG_Vision_TMOUS_1.19.531.1_Radio_12.21.60.09b_26.02.01.15_M2_release_149459_signed.zip from http://forum.xda-developers.com/showthread.php?t=971109
(noting the *.15 is the original radio my device was shipped with, though I've upgraded to the newer *.19)
I of course have no intention to returning to complete stock, but it's usually the only course of action for most people stuck with S-ON (and then would look into exploiting/unlocking/rooting again from there).
Click to expand...
Click to collapse
Im confused on which one to flash I have a T-Mobile HTC G2 which one will i flash?

choose the latest one for the g2, reading your thread I feel you will have little luck with this. try logging onto freenode #g2root, you'll get real time help here
Sent from my HTC Vision using xda premium

demkantor said:
choose the latest one for the g2, reading your thread I feel you will have little luck with this. try logging onto freenode #g2root, you'll get real time help here
Sent from my HTC Vision using xda premium
Click to expand...
Click to collapse
I am new to XDA how can i do that?

helstonrampersad said:
I am new to XDA how can i do that?
Click to expand...
Click to collapse
I'm new so I can't post links, but copy and paste this url: http://webchat.freenode.net/?channels=g2root
EDIT - Oh, I can post links.

eboy_gb said:
I'm new so I can't post links, but copy and paste this url: http://webchat.freenode.net/?channels=g2root
EDIT - Oh, I can post links.
Click to expand...
Click to collapse
Though ideally using an actual IRC client will work much nicer than a web chat one.

Same problem, but desire z S-ON
Hey guys.
I have the same problem with the boot loop /semi brick. Expect I never had any problem before, with the phone. I have tried taking out the sd card, starting it agian. I have tried without simcard. I have tried to flash the ROM with RUU_Vision_Gingerbread_S_HTC_WWE_2.42.405.2_Radio_12.56.60.25_26.10.04.03_M_release_199043_signed
via Hboot Fastboot USB PLUG mode (which was the only mode the aplication was progressing in until it want to restart the phone in bootloader), but the phone frezzes and the aplication on the computer just keep working, without progress.
The factory reset just frezzes the phone.
The only thing reali seem to not frezze the phone is the revocery option. Here the phone react with restart showing a image of a phone with two green arrows bent around, over the phone. then it turns off the display and vibrate 4-5 times, og stays turn off not reacting to anything other then taking out the battery and you can start the phone once again.
VISION PVT SHIP S-ON
HBOOT-0.85.0013
MICROP-26.10.04.19_M
eMMC-boot
Apr 11 2011, 23:36:27
Have no idea but the version of android. I know that usb debugging is NOT on Any hjelp is a big help. I'm a noob, And I have been searching for 3 days for a solution, so I just hope you can help my, otherwise it is going for a repair at the place I bought it.
Thanks

Unable to get into bootloader or recovery mode, stuck at white HTC logo screen

Hey everyone,
I have read the various topics with a similar title but none helped.
Here is my problem, I bought a used HTC Desire on eBay. It booted just fine on the first start, then I did a factory reset (from within the Android system menu).
Since then, I'm stuck at the white screen with the green HTC logo. I have tried to get into bootloader mode by removing the battery, holding vol down and power, but it just goes straight to the white screen again.
Also connected the phone to the pc, but adb isn't picking up anything...
Any ideas?

Try Power+Back button.

just got one step further:
I can get into fastboot mode with BACK + POWER. But volume keys doesn't work, is that a known issue that I can solve somehow?

Goddchen said:
just got one step further:
I can get into fastboot mode with BACK + POWER. But volume keys doesn't work, is that a known issue that I can solve somehow?
Click to expand...
Click to collapse
So you bought a Desire with broken volume keys.
Are you s-off?

abaaaabbbb63 said:
So you bought a Desire with broken volume keys.
Are you s-off?
Click to expand...
Click to collapse
looks like...
in fastboot mode it shows that it is s-on.

Goddchen said:
looks like...
in fastboot mode it shows that it is s-on.
Click to expand...
Click to collapse
Then you'll have to flash a RUU to make it work.
http://forum.xda-developers.com/showthread.php?t=1772499
It's official HTC Firmware. Your phone will boot after this.
So:
1. Install HTC Sync.
2. Download and extract the RUU.exe from the zip (It's somewhere in there)
3. Run the exe while you connect your phone in fastboot (Power+Back)
4. Wait for it to install
5. Boot

abaaaabbbb63 said:
Then you'll have to flash a RUU to make it work.
http://forum.xda-developers.com/showthread.php?t=1772499
It's official HTC Firmware. Your phone will boot after this.
So:
1. Install HTC Sync.
2. Download and extract the RUU.exe from the zip (It's somewhere in there)
3. Run the exe while you connect your phone in fastboot (Power+Back)
4. Wait for it to install
5. Boot
Click to expand...
Click to collapse
Thanks for the advice, I downloaded the 2.3 RUU and it starts the process, sais
rebooting to bootloader
erasing data
sending...
and after ~30 seconds it just shows me a screen that sais "ERROR_UNKNOWN"
On the phone I see a black screen with a silver HTC logo during the process and when I unplug the USB cable after the error it shows the hboot screen that now sais "update failed".

right before the error is shown it display "updating signature"

Goddchen said:
right before the error is shown it display "updating signature"
Click to expand...
Click to collapse
It only says "Error_Unknown"? No error number, anything?
Weird.
This may be the reason:
Now, that may not sound too bad to some of you, but there's more: the 2.3 RUU update is limited regionally, as well. It's not available to users in Germany, North America, South America, South Korea, or Japan.
Click to expand...
Click to collapse
You live in Germany, right?
Use this guide then:
Section 2, S-on
http://forum.xda-developers.com/showthread.php?t=1275632

yes I am in Germany,
made some progress (or not?)
I noticed that the device was "unlocked", so I did "fastboot oem lock" and it was "relocked".
Then the RUU update went through - nearly. At the very end if failed again and now I am stuck at a black screen with the silver HTC logo and triangles in every corner.

AW: Unable to get into bootloader or recovery mode, stuck at white HTC logo screen
Sent from my Nexus 4 using xda app-developers app

wtf... tried again flashing the 2.3 RUU, this time it worked, YEAY
But now I have a bootloop, device starts, vibrates 1 time, waits for 3 seconds, and then vibrates 7 times. And restarts...

Ok. Tests are done.
According to the screenshot above and the 7 vibrations, you have a radio brick. It's a brick that can hardly be overcome.
The only solution is flashing the RUU and hoping that the phone will eventually boot.
That's why I don't buy second hand phones.
This thread might help:
http://forum.xda-developers.com/showthread.php?t=1793369

abaaaabbbb63 said:
Ok. Tests are done.
According to the screenshot above and the 7 vibrations, you have a radio brick. It's a brick that can hardly be overcome.
The only solution is flashing the RUU and hoping that the phone will eventually boot.
That's why I don't buy second hand phones.
This thread might help:
http://forum.xda-developers.com/showthread.php?t=1793369
Click to expand...
Click to collapse
freecer did it, was able to flash the 2.3 RUU again successfully. But now I'm back at the bootloop, but now, it simply does vibrate once (no more 7 vibrations) and reboots after some seconds.
So what can I do now? RUU flashed successfully, I'm running out of ideas...

and again the freezer did it, put it in, normally started via POWER button, it booted right through into Android.
Well, let's see if it keeps running now or if this overheating issue also exists in normal operation mode...
Thanks so much for you help so far, the freezer hint saved this device and hopefully will make my gf very happy tomorrow

Hold on I thought it was some pvt1 devices that had overheating issues.
Thought it was fixed on your newer ones. Then again I've never had a problem with my pvt1 desire flashed both hboot and find countless times.
Sent from my GT-I9100 using xda app-developers app

dethrat said:
Hold on I thought it was some pvt1 devices that had overheating issues.
Thought it was fixed on your newer ones. Then again I've never had a problem with my pvt1 desire flashed both hboot and find countless times.
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
it is a PCT3 device.
but the overheating-reboot issue is rendering it useless. I can use it just fine outside (-2° currently) but as soon as I'm inside, boot-loop...
Anything I can do from a hardware perspective to fix that? Sending it in for repair/replacement is not an option, it's simply not worth the cost.

do you think installing a custom rom of any kind might help?

Goddchen said:
it is a PCT3 device.
but the overheating-reboot issue is rendering it useless. I can use it just fine outside (-2° currently) but as soon as I'm inside, boot-loop...
Anything I can do from a hardware perspective to fix that? Sending it in for repair/replacement is not an option, it's simply not worth the cost.
Click to expand...
Click to collapse
It's a motherboard fault. If you don't send it to repair, you just got yourself an "Ice-Phone", or a very complex paper holder.

i think a custom rom would help a small bit, like the rom in abaaaabbbb63 sig (mildwild redux) because its small and lite unlike a sense rom. therefor it mite not overheat as quick or as often. but thats only a guess. the only dodgy thing is trying to get ur phone s-off or rooted because if ur phone overheats in the middle of the s-off/rooting progress u could brick ur phone. plus charge ur phone using ur computer coz it uses less power and the phone does'nt heat up as much as plugging into the wall.

Stock T-mobile G2 suddenly stuck in bootloop. No update. Want to backu

So, 2 nights ago I was just sending a message to someone when my phone rebooted. I wasn't downloading an update to my knowlege. Now it won't boot mostly. I can't get into download mode either. If I wait about an hour then hold the power button it will start and get to my home screen. It will stay on for about a minute then shut off and give me a LG splash screen or the t-mobile screen. When attempting to enter download mode I get the 8 red flashes. If I just leave it plugged into my laptop I'll get the charging screen. If I then power up, after some time my computer will recognize it's com port and modem but not as a hdd. There are files I absolutely need for work and school and they haven't been backed up. What does the craftiest android user do in this situation? I can get to the factory wipe screen. But, I really can't just wipe this phone yet. Help me PLEASE! I've watched hours of videos and read so much over at xda and haven't found anything that quite suits my situation other than a factory wipe. There's gotta be another way.
I can't get into the boot loader. Volume up and power only starts the boot loop again. Can't do download mode. I have gotten it to boot a few times but only for a second before restarting and giving me the LG screen
I've tried both the LG pc Suite and the Lg mobile support tool and tried the "restore upgrade errors" approach. Keeps getting to the end and telling me that the phone isn't charged. It's 100% charged. I have the ability to make videos but I wont have time until Sunday.
Can't get into fastboot. Fast boot for PC starts opens and shuts instantly. I also have the Minimal ADB and fast boot but it says it doesn't recognize a device.
I read another post where a nexus user had a similar issue and was able to root with CWM, though I believe he must have been able to get into the download mode.
This is stock. I've rooted my old galaxy S2 but kept this one stock. I've only skimmed the surface as far as the knowledge and ability many of you have and I'm hoping you have some kind of method of fixing this or at least eliminating the things I could try.
Very sorry for such a long post. It's late and I'm loopy. Thanks in advance for your help.

Pretty please!

You are in the wrong section my friend. This is T-mobile HTC G2 (aka HTC desire Z) section.
Thanks...

Oh, that makes a lot of sense! oops. Thanks.
arunal_123 said:
You are in the wrong section my friend. This is T-mobile HTC G2 (aka HTC desire Z) section.
Thanks...
Click to expand...
Click to collapse