Diamond screen not working

[nyclegend20]

my brother has the htc diamond for sprint and the screen just stopped working all of a sudden
it was not dropped no water damage
screen is perfect condition not even a scratch
it has mighty rom on it, so can i still take it into the sprint store for repair or will the void it cause of mightyrom?

how can i put stock rom back on the phone without using the screen?

it has a lock on it which i cant unlock with putting the code into the phone

[horndoctor]

Wirelessly posted (HTC Diamond: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.11) Sprint MP6950SP)

Have you tried hard resetting it first? If that doesn't work then download the Sprint shipped rom to your pc. Turn your diamond off. Then press and hold the volume down button then press and hold the power button and continue holding both until the rainbow bootloader screen appears. Then connect your device to your pc with your usb cable and then it should say usb on the screen. Then click on the exe for the shipped rom and flash back to stock.

[MrObvious]

Try plugging it in and loading up ActiveSync. Install the software called Sparus Software Everywan Personal Edition (I think that's the name) and you should be able to remote control your phone from your PC screen.

[patheticpuma]

regardless of the lock, you should be able to enter bootloader (pull and reinsert battery, hold vol- and power for 5 seconds) plug in your phone and try to flash the stock rom, of course only do this if you need to do a warranty exchange.