I have an HP Pavilion a220n that shows "no computer signal" on my vga monitor
I changed the cmos battery, no help
I reseated the ram, no help
I installed a PCI video card, no help
I downgraded the processor with another AMD, no help
I hooked up a 150W PSU to the motherboard and hard drive only, no help (original is a 250W)
Back with the original 250W PSU, I get the power button light, dvd drive light, cd drive light, cpu fan, case fan and psu fan, but no beeps. I can't tell if the hard drive is spinning or not.
the computer starts when i plug into the wall power without pushing the power button on the front, only way to shut off is holding down the power button for 5 seconds or pulling out plug from the back.
What on the motherboard could be bad? I thought it was more common for psu's and processors?
This machine was working for you before, or is it something you just recently acquired and now find it this way? It starting up as soon as you plug it in suggests that it wasn't shut down properly the last time, maybe due to some fatal occurrence. You've removed the battery, let it sit for awhile, and tried starting it up without the hard drive connected? Might as well disconnect the CD and DVD drives too. See if it starts with just the floppy (if it has one?). If no, then disconnect the floppy. You're trying to just get to square one.
Yep, I'd remove everything except one stick of RAM, power, video, mouse and keyboard. Get it into a minimal boot config and try to get into the BIOS. If you cant' even get it that far, swap out the RAM and try again, and if that doesn't work clear the CMOS settings, if not then I'd suspect something wrong with the mobo or CPU.
thanks everyone for your suggestions. after screwing with it all day I've come to the conclusion the motherboard is bad.
So I stripped it for parts and recycled the rest.