Does this indicate a dead PSU?

[ConstipatedVigilante]

I've been trying to get my upgraded computer to work. I found that the CPU was dead, so I got that replaced. Yesterday I plugged in the new CPU, turned on the computer, it booted, and I let out a cheer. Then it just turned off, and I haven't been able to get it going again. The only sign of life it gives me is that the CPU and case fans turn the tiniest bit then stop. So I checked all connectors and reseated the motherboard; no luck. Then I put in my old motherboard/CPU/RAM that I confirmed working several weeks ago. And the PSU worked then. Exactly the same result - the CPU and case fan move a tiny bit.

Does this indicate a dead power supply? The only other common component between the two sets of components is the video card, but would a dead GPU cause this?

Edit: Also, this PSU sat in the closet for several years doing nothing. Does time take a toll on this sort of component?

 

[Minion4Hire]

Edit: Also, this PSU sat in the closet for several years doing nothing. Does time take a toll on this sort of component?

Yes.

Electrolytic capacitors don't age gracefully. Better said, they lose potential storage capacity as they age.

Grabbing a different power supply to test your system with would be ideal. Also, remove the graphics card. The added strain from a GPU on your power supply won't help anything. If you don't have integrated graphics your system should be able to power on (with all fans spinning) even without video.

 

[ConstipatedVigilante]

Same result without the GPU. The PSU is about 4 years old and was only actually used for 1 year of that. I'll shell out the cash for a new PSU - I really want to get this box working.

 

[homercles337]

Why dont you pick up a PSU tester first?

 

[Minion4Hire]

Does the flea power LED on the motherboard light up when the 24-pin ATX power connector is, well, connected?

 

[ConstipatedVigilante]

Does the flea power LED on the motherboard light up when the 24-pin ATX power connector is, well, connected?

Yep. So maybe it's just...mostly dead.