I'm working on an HP Pavilion a6300f PC ( http://h10025.www1.hp.com/ewfrf/wc/product?lc=en&dlc=en&cc=us&product=3644689 ) that wont boot up. (no display, no beeps, no lights other than power, the cd drive, and for a split second the hd light when you first turn it on)
I'm told a few months ago with stock parts (nobody opened the case since it was purchased) it just wouldn't boot up. I tried using a different monitor, and a DVI connection instead of VGA.
When turned on, I hear the hard drive spinning up, but it never actually seems to do any read/write noises. It has integrated video, but I took out the pci modem that was on it, and tried using one stick at a time with both of the two RAM sticks at a time on it.
I've tried removing all unnecessary connectors (USB/etc) and reseating all connectors/jumpers I could get my hands on, as well as blowing dust off the motherboard.
I swapped the power supply with no luck (I don't have any other compatible parts to swap), though the current power supply connector leaves four open pins on the main motherboard connection. (weird?)
This all leads me to believe it's the CPU, but I suppose it could be the motherboard as well. Is there a way to tell without seeking replacement parts?