Another poster seems to have a similar problem below but I didn't want to hijack his thread so here goes.
The power to my subdivision cycled off and on rapidly about 15 times the other morning. Afterwards my computer (HP a530n) wouldn't start. it gives no lights on the front and you don't hear anything inside happening (no fans spin up) on the back of the Computer the PSU LED is flashing.
I went through the online troubleshooting guide from HP and got to the point where you disconnect the PSU from everything to give you a solid green (if PSU is good) and then plug in things until the LED flashes again showing the fault. Well the first thing I unplugged after removing from the PSU was the Motherboardand decided I would go ahead and check the PSU LED as I disconnected things. Sure enough the PSU LED went solid green. So I decided to check out the PSU just to be sure by swapping it out with another that I had nearby in another desktop (call it computer #2). The PSU from Computer 2 went into Computer 1 and I get the fans to spool up for about a second before it powers back down. So I took the PSU from Computer 1 and placed it in Computer 2 and it started right up with no problems whatsoever.
So here is my question:
To me it looks like I have a bad Motherboard. Do you agree?
Or could it be one of the cards attached to the motherboard that is bad and that I need to unplug the individual cards from the motherboard to check them?