PSU degrading?

[ComputerTime]

Hi,

My computer started showing problem recently.

1) The M.2 SSD is not recorgnised in the initial boot up of the day. I have to shut down, power off and then start up again to get it recorgnised. I have removed it then.
2) Few days ago, the PC stop starting up after I switch on the wall plug and press the power button. I will have to let it "charge" for around 10 min then it can be switch on. I did a jump start test on the PSU and I can see the fan start to spin.

The PSU I am using is Seasonic ss-750km for around 7-8 years (cannot remember already), while the motherboard, CPU, etc is around 4+ years. All items already out of warranty.

Any suggestion as to where can I bring my PC down for diagnostic whether is it a issue of power supply or motherboard?

Regards.

 

[86technie]

1) The PSU have to discharge but not charge than can switch on.
Faulty PSU that Seasonic model is very old, have to change.

2) M.2 if under BIOS cannot detect or random BSOD like Windows cannot load.
The SSD have to go service/RMA.

However given the symptoms if you are using a old PC, suggest build a new one.

 

[wwenze]

1) This is unlikely to be related to PSU.

2) Jump start works means the PSU can power up. Which means two things:
--1) The motherboard is not using the pin that you use for the jump start to turn on the PSU
--2) The motherboard waits for the "Power Good" pin to be ok first before it can turn on the PSU. So either the Power Good signal is not good, or the Power Good signal is good and the motherboard still refuses to turn on. So it is 50/50 for motherboard vs PSU without further troubleshooting to make it 100% confidence.

So points 1 and 2 combined, it is likely to be the motherboard.

But how do you confirm it? Simple, both the PSU and motherboard have capacitors that take time to charge. Even when turned off, the motherboard is getting charged via +5VSB.

If you know it is a charging problem, but you are charging two things at the same time, how do you know which one is the culprit?

Simple, test the charging one by one. With everything discharged, disconnect the motherboard so it only charges the PSU for 10 minutes. Then connect the motherboard. If it powers up immediately, then the motherboard can charge instantly. If it still takes another 10 minutes to charge, then it is the motherboard charging.

 

[ComputerTime]

Finally found back this thread.

When I mentioned "charge", I am referring to charging the capacitor.

Anyway, I read somewhere that delayed started up can be due to HDD faulty. So I disconnect a old HDD (it has bad sector), and the computer can start up immediately.

I reinstalled the M.2 SSD, and the computer is working is working smoothly until now (around 1 week). Now, I am wondering if this dying HDD caused the random popping sound of my speaker.

As of now, the issue is solved, and I will continue to monitor.

Thanks, techidiot and wwenze.