hi I am currently diagnosing the old socket 370, P3 i use to use before. its currently turning ON, however there no beeps but monitor turns on as in the red light turns to green but it says "no signal". and the HDD light is solid red so as the CDROM light. i suspected it was ram, so i pulled it out and fitted another one with same specs but sam problem. any guesses? Motherboard is Gigabyte GA-6VEML cheers!
try resetting the cmos, its highly possible that because of its age the cmos data could become currupt, if you dont know how to do it open your case and locate a small jumper (connector) next to the small lithium battery, move the pin over the other 2 pins for 10 seconds, then replace it back on its original position, then try to boot. if it all fails again let us know