Last Monday, I was in Microsoft Word when the screen froze. The mouse pad wouldn't work or anything. So I mistakenly hit a few buttons on the keyboard before finally turning it off. [Esc, ctrl+alt+delete, etc] Then I discovered that it wouldn't go off, not really. It keeps going in and out in hibernation or sleep mode [I guess], every 20 to 30 seconds. It shows a black screen--with no cursor, i.e. nothing. The screen has frozen before and I would just turn it off and turn it back on. And it would work. This time it doesn't. It's just a black screen, and turning off and on every 20-30 seconds. I turned it off completely once or twice and removed the battery and turned it back on. Still the same problem! Someone suggested I turn the PC off and then on and hit f10 or f11 repeatedly. I tried that but it didn't work. Nothing happens. Also, it doesn't make a noise when I pop out the CD-rom drive. Otherwise it does, and the fan works. And when I push ctrl-alt-delete it doesn't turn on/off. It just sits there. I can't get anything to happen. I can't get f8 to work either!
Can you help me, please? Compaq Presario F732NR, Windows Vista. I've had the computer 18 mos. I think the warranty has expired.