Develop Bugs

[Q] Desire won't boot up

two days after updating my unrooted desire to 2.1 over the air(ota), it started giving me problems.
First it started by reducing the ringer volume on its own untill its on vibrate, then it would go into car mode.
I restarted the phone, then that stopped, but 3 buttons(menu, search and action key) stopped working.
I did factory reset which didn't help and when I go to the web, the browser would turn the wrong way(landscape).
Now the phone just won't boot up, it gets stuck on the htc logo screen.
I have read some suggestions here, but nothing works.
I tried recovery, but it still get stuck on the htc logo.
Any help will be very appreciated.

[Q] Official Desire Z stuck at splash screen

Hello guys,
i was playing with my DesireZ last night and suddently it freezed.
I've pull out the battery, then reboot but it stucks at the HTC splash screen (white and green HTC logo).
I'm still able to access bootloader and fastboot, but when I try to perform a factory erase it freezes again and i must pull out the battery.
What could I do? I've original bootloader, ROM...all out of the box!
Thanks, I wanna have my chance first to call the assistance..

http://forum.xda-developers.com/showthread.php?t=1417267
look at my firt post there... maybe one of the options work.

[Q] DHD Bricked? Can't boot up + Recovery doesn't work

Hello,
I got a 'little' problem, I think that my HTC Desire HD is bricked.
And I dont know how, because when I woke up this morning, I tryed to boot my Phone and it just didn't.
I've noticed that my orange led was blinking, so I removed and reinsert the battery, so i could start up my phone again. That worked fine,
but when it reached the white screen with the green HTC logo, it's just got stucked in there and it won't do anything anymore.
So I rebooted into the recovery screen (with On/off button + volume down) and choose for Recovery, but that didn't worked because then I got stucked in a black screen.
The last thing that I tryed is to use fastboot, but if I choose for bootloader it kicks me back in the recovery menu.
I have installed HTC Sync for the drivers, but still don't know what to do further.,.
(When my SD card is needed, I could put it in another phone to change or place files on it.)
I already appreciate your time for this and I hope there's someone with a solution for me.
Best regards,
Donny

Cant turn the screen on and stuck after screen off

My One X works properly for close to 2 years but last 2 weeks my phone start to have strange problem. It will randomly reboot and stuck at boot up or sometimes after screen off I cant wake it until I hard reset it by holding power button. And a lot of time it will just stuck during boot up with HTC logo and cant go into OS. I tried to return to stock by flashing nandroid backup, even reflash the hboot but the problem still there. I tried connect the phone with my pc and I can hear the usb unplug sound from pc after the screen off for some time. However, it is not stuck in sleep everytime, but often. Anyone have any idea what was wrong?

htc 816 not responding to anything after marshmallow update

i got a notification for an update so i did it and the mobile then got stuck in blank black screen...
i pressed volume up and power buttons ... the mobile rebooted and now got stuck in the htc white screen...
refused to go to recovery mode ... and wont get recognized so i can flash it ...
i was able to go to recovery mode after draining the battery right after connecting the charger... i pressed recovery but nothing happened ... went back to the black then white freezing
is there anything i missed???
my mobile is not rooted