Heating A/C Thermostat screen is blank

My colleagues and I work in a tech environment and we have seen several computers with the same symptoms. Namely a failure to boot xp. After the xp logo screen the screen goes to blank and it just hangs. This looks like a graphics card fault but changing card does nothing. Booting into safe...

I don't have an answer sadly. My laptop is, you guessed it, 2 years old. It was operating normally one day, and when I went to turn it off, it was frozen. Hard drive light was on without blinking. Just solidly bright. So I held the power button down. And the next day I went to get on the internet...

How do I reset my mp4 player; it comes on but nothing comes up on the screen

I have my Gateway Flat Screen monitor set to power down after 1 hour (and leave it on overnight) and the last 2 days I have come into work and normally would just touch the mouse or keyboard and the monitor would power up and everything would be good. The last 2 mornings I have come in and touched...

While on the internet my computer froze up and when I did control alt delete my screen went blank with all wavy lines. I shut the machine off and sbooted up again only to get the blank screen with wavy lines. No matter what I try I cannot get to my desktop. Can anyone help? :eek: