Back ground info:
PC = Home built w/Mach Speed Viper MK8-939A, AMD Athlon 64 3200+ 2.0GHz, Ultra 1024MB PC3200 DDR 400MHz Memory (X 2), Seagate 500GB SATA HD, Logitech wireless mouse and keyboard, Norton Antivirus
My daughter reported a problem with a frozen cursor at the log in screen and thought it was a problem with the wireless mouse. She plugged in a USB mouse and restarted the PC without resolving the problem. When I came home I checked the mouse and keyboard and found no problems with the batteries. I had to hard boot the PC to get it to restart and again got to the log in screen with an unresponsive system. Decided to try starting in safe mode and was able to get to Windows. Ran Norton and it claimed to have detected and cleaned 110 tracking cookies. I restarted again and got the black screen. CTRL ALT DELETE restarted the machine and I selected a restore point from a week before. The restore seemed to run properly, but Windows now does not load and I can no longer get out of the black screen or into safe mode or bios. I cannot boot from the XP disc and I even tried unplugging the hard drive. All I get is a single beep, the DVD drive light briefly, the hard drive light briefly (steady state) and then the black screen again.
The PC was working great with no prior symptoms, no recent changes or additions. What if anything is left for me to try?