Re: PC PSU issue
I took the motherboard out of the system and hooked it up with just the PSU, CPU, 1 stick of RAM, and the graphics card and it did the same. As soon as you give the PSU power the motherboard starts to pulse. I also noticed the green led on the motherboard flickers so that must mean it can't be regulating the power properly. I expect it is a bad cap, but they all look perfectly fine when I examined the board.
So it looks like the board has had it.
My options now are to source a second hand AMD 939 motherboard from ebay or elsewhere at a reasonable price, but being second-hand there is no guarantee how long it would last. Or buy a new replacement ASRock board (only 939 board still made), or alternatively see if the owner is interested in upgrading to a newer CPU for slightly more money.
Now he isn't a power user and I could build him a newer system using a E5200, 2GB DDR2 ram and motherboard for £109, whereas the replacement ASRock 939 motherboard would cost £65 on its own. So maybe an upgrade would be worth it for the extra £44.
I took the motherboard out of the system and hooked it up with just the PSU, CPU, 1 stick of RAM, and the graphics card and it did the same. As soon as you give the PSU power the motherboard starts to pulse. I also noticed the green led on the motherboard flickers so that must mean it can't be regulating the power properly. I expect it is a bad cap, but they all look perfectly fine when I examined the board.
So it looks like the board has had it.
My options now are to source a second hand AMD 939 motherboard from ebay or elsewhere at a reasonable price, but being second-hand there is no guarantee how long it would last. Or buy a new replacement ASRock board (only 939 board still made), or alternatively see if the owner is interested in upgrading to a newer CPU for slightly more money.
Now he isn't a power user and I could build him a newer system using a E5200, 2GB DDR2 ram and motherboard for £109, whereas the replacement ASRock 939 motherboard would cost £65 on its own. So maybe an upgrade would be worth it for the extra £44.