Well you may want to check the site hp.com. I know on some of the newer compaqs which HP now owns they have incorporated post diagnostics in which will flash the keys on the keyboard along with beep codes. Oops, i just checked in HP.com and your system was built in 1997. Kinda old for a pc these days. It could be anything. When it is flashing all of these lights does the power supply fan spin. You may want to take the case off of the pc and see what all is working while you try to power it on. Check and see the Power supply, Hdd, and Cpu fan all are spinning while the lights are flashing. My first guess is probably the powersupply.
i am no lazier now than I was forty years ago, but that is because I reached the limit forty years ago. You can\'t go beyond possibility.
- Mark Twain