My computer monitor keeps shutting off on me. I have a dell inspiron b130 (i know it is kinda old) but i don't think its a hardware issue. it has started happening since i installed windows 7. at first i thought it was because my original product key didn't work, but i did the automated phone activation, and validated on the website, but it still shuts off. If i don't use my computer for awhile, it may stay on for a good 20 mins or so, but once it shuts off once, the time it stays on gets less and less. but, i just close the lid and open it back up and it works again...any ideas as to what is going on?!?