[Resolved] PC won't boot

I built a PC (Win98SE, PCChips motherboard, Athlon 3000XP CPU, 40 GB HD, 256 RAM.) for my fiancee, who downloaded some software that ended up being spyware, at least according to Ad Aware. She uninstalled the software and kept getting BSOD's until she got frustrated and shut it down.

This morning, she called me, saying that the PC would start but the message on the monitor said "Monitor is in power save mode. Activate using PC." When the PC powers up, the fan turns on, the CD drive light blinks, but the monitor won't do anything but give that message.

Also, the POST gives 3 long beeps instead of the single normal beep.

I've tried the Windows start up disk, I even pulled her hard drive and slaved it in my PC and it worked fine. I'm stumped!

Thanks in advance.

Brian