I'm not sure of the model. I got it on ebay and the listing is over so I can't go back and look at it. It was from this guy, kinda like this one, he sells alot of them
http://cgi.ebay.com/1-FAST-DELL-PC-P...742.m153.l1262
I'll see if I see model number or anything on it tonight.
No beeps, not sure on light. How much is motherboard to replace?