I just turned on my computer (granted, it's just a 6 yrold backup machine but it's got some stuff I need to get out before I junk it) and the monitors just stay black (after a quick no signal going to sleep msg). The keyboard blinks once, and then becomes unresponsive (I'm assuming because I can't see anything but even ctrp-alt-del doesn't seem to do anything). Is there any way to determine if this is a simple video card failure, or something more sinister?