Sounds like possibly a hard drive issue or CMOS issue. Because of the age of the machine there is no guarantee of what is inside control wise. But I would start with going to CMOS and checking date and time. If that is wacked out chances are the hard drive settings are also. Then standard computer PM. Do a SCANDISK and DEFRAG to check for problems. If found, you may need a hard drive, and software. It may also be logic power supply related. check your fan on the power supply to see if it is running and the 5 and 12 VDC.