I'm not quite sure what the problem is here so let me explain whats going on

I start my computer fine boots well etc.. but it has started acting up in the last few months at first I thought it was my monitor going my system is 3 yrs old Windows XP media Edition SP2 and has rarely been turned off

I will suddenly loss signal to my monitor and my monitor will go into sleep mode computer is still running as far as I can tell does not crash or reboot. I manually reboot the computer and sometimes the monitor will come back on sometimes not. Tried another monitor and system seemed to do well for about a week and then started to do the same thing. anyone have any idea whats causing this? computer runs quiet it clean I've run every scan I can think of nothing is found Help!

I'd be suspicious of the video card. If you have a separate card installed into the motherboard, I'd check that it is firmly/properly seated in the slot. If you have an on-board video card, then you may need to buy a new card and install it in a slot and then set-up the pc to use the new card instead of the old one.

I don't really expect it to work, but they always advise it, and it does occassionally work, check for and install any new video drivers for your equipment. Because it is a Dell, that is usuallu pretty easy, check their sitefor updates for youour pc, using your service tag.

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Thank you that seems to have been the problem system is working tip top now I was so afraid my computer was on a downward spiral and I love this machine and really do not want another one