I am working on a HP Pavillion 6835, when you plug in the power cord the Fan spins and the lights go on the computer for about 3 seconds followed by a single beep and shuts off. You can not press the power On button, does not do anything. I unseated everything and tested the power supply. I changed the power supply, i changed the memory. Still same issue. The cpu is a Socket370 Celeron 888/128/100/1.7v, I want to see if it is a failing cpu but the only S-370 chip I have is a P3 - 866/256/133/1.7v, will this work or harm anything being that it is a 133 FSB??

Thx