blank screen

[ahdhulla]

hi,
my iPhone 3G shows a blank screen but seems like all other functions are working well. iTune detects it and can sync and do everything as a normal one.

i ve updated it to iOS 4.1 several months back and it worked fine. and when i try to install something theme changer its screen goes blank

i have tried several things, like restored from a backup but still the same.

thanks in advance

 

[jasvncnt]

Have you tried setting up as new phone and not restoring from back up