Having a bit of a problem with an Acer 7520 laptop, yesterday it crashed to a white screen with bits of static on it, almost like the graphics card had overheated. I switched it off and left it for a while and now its refusing to boot up. When you press the power button it begins booting and the lights come on, but after a couple of seconds it powers down, then tries to start again. It never gets far enough for the screen to come on and it will keep doing this cycle until the power is unplugged and the battery is removed. Ive tried the following without any luck: Booting up with battery removed and power in/vice versa - no effect Opening up the back and cleaning all the dust out of it - no effect Removed one of the two ram chips and tried booting, then same with other - no effect removed both Ram chips and tried booting - no effect (the fact that it isnt even complaining that there is no ram in it leads me to believe something in it is seriously messed up.) Re-seated hard disk - no effect Removing battery and unplugging from power and leaving overnight - no effect So its looking like its a dud but if anyone has any ideas for other stuff i can try i would be very grateful.