[CUBE] Help. Dying Cube?

[vze28f48 at verizon.net]

> A couple of days ago, I started noticing artifacts (black dots in 
> distinct shapes) right around my mouse pointer.  It went away after a 
> reboot.  Today, I've not only had that but the Cube is behaving 
> erratically with major artifacts (one pixel lines running vertically 
> across the screen about every 1.5" apart, etc.) appearing and major 
> problems booting (like not booting after power is turned on).  I rested 
> the Cube for a couple of hours, and now things are working (but for how 
> long I am not sure).

Sounds to me like your video card is overheating.  Do you have a small fan you could put near the computer to blow down into the video card grille?  Let the computer cool off, then run for a while with the fan and see if it fouls up.