Computer doesn't want to start up
I have an old system (5 years old), an Asus CUSL2-C motherboard with a P3-733 MHz running Windows 2000. The power supply is less than a year old.
A few weeks ago, I went to turn on the computer and when I pressed the power button, the computer power turned on, fans going and everything, and then about 2 seconds later, it shut off, and the green light was just blinking. Pushing/holding the power and reset buttons did nothing. I had to flip the power supply power off and maybe 8 seconds later the light stopped blinking. After a few more tries with the same result, it randomly started up, put me in the BIOS setup with the message, "During the last boot up, your system hung for an improper CPU Internal Frequency Setting. Your system is now working in safe mode. To optimize the system performance and reliability, make sure the CPU internal frequency conforms to the specifications of your CPU."
It was not incorrect, and I am not overclocking. I exit out and it starts up fine. Now if I shut down at some point, it doesn't want to start back up until it decides I've waited long enough I guess. I can simply restart all I want with no problem. I tried replacing the motherboard battery and that didn't work. I was in the process of trying to update/flash the BIOS but I couldn't figure that out, and now it has been over a week and it hasn't started up. I'm thinking it is dead.