Don Dewitt: Do the lights do any pattern?,Does it beep 5 times steady or does do 1 beep then 3 beep then 1beep,here is what I found online,hope it helps. http://support.dell.com/support/edocs/systems/dim8400/SM/adtshoot.htm#wp1052933 Best Regard, Antonio Figueroa --- On Fri, 6/5/09, Donald DeWitt <[log in to unmask]> wrote: From: Donald DeWitt <[log in to unmask]> Subject: [PCBUILD] Computer Problem To: [log in to unmask] Date: Friday, June 5, 2009, 2:22 PM Booted up computer today and it ran normal for about ½ hr. and then suddenly shut down. First the screen went black, then there were 4 or 5 beeps coming from the tower, and finally a sound like the hard drive was spinning out control that lasted only a short time. Rebooting resulted in a blue screen stating Windows was shutting the system down. Using the F12 key I entered into a page that let me do a Hard Drive Diagnostic test. The results revealed – “Pass” This computer is a 5 year old Dell 8400 running XP. I have not added any new software or hardware recently and I do a daily run with AVG and Super anti spyware. Do you have any suggestions what the problem might be? Thank You, Don Dewitt The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com The NOSPIN Group Promotions is now offering our special coffee mugs and mouse pads with the PCBUILD logo... at a great price!!! http://freepctech.com/goodies/promotions.shtml