Whenever She Who Must Be Obeyed goes into our attic she complains bitterly about "those boxes of computer junk that you are hoarding" and so my New Year Resolution is to do something about them. My chosen first project is to build a desktop so that I can play about with Linux.
I was given an old tower where the PSU had exploded with a large "pop" and where a replacement PSU has failed to let it boot up. Fans spin, hard drives and CD Drives whirr, but no beeps or other sign of life. It must be a dead CPU or motherboard (the latter has been physically examined but shows no signs of mechanical damage).
So any guesses anyone? The CPU is a Socket A Athlon and it uses DDR memory so I plan to buy parts off ebay just to try something out but which to buy first a CPU or a motherboard? All comments gratefully received.
Ok lets pretend(bear with me on this) that its only the PSU thats died. Does it have a graphics card or onboard? How many sticks of Ram are installed? Is there still a hard drive attached? If the answer is yes to any of this then remove them and see if you get any beeps from the mobo
More often it's the motherboard that fails than the CPU - in fact over the years, after PSU "bangs", I can't remember a CPU ever failing - but a number of motherboards did, some witj similar synptoms to yours.
PS - not my system I hasten to add - those I've had to repair. Usual cause of PSU ills is simply low quality PSUs.