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Booting problem ...

Warp01

Junior Member
Hello.

Whenever I turn on the power supply and press the case switch button nothing happens.
I have to wait for 20 seconds, press the button again and the booting process starts now.

Is it a mobo problem or a power supply unit problem?

It never happened before.

Regards
 
Try leaving your power supply on then press the case start button and see if it makes a difference.
Your mobo maybe looking for a V standby or 5VSB and does not see it when turning your ps and start at the same time.
 
If I leave the PSU on and press the case start button it works properly.

If I leave the PSU off for hours (and therefore the whole system) I have problems.

I tend to think that the PSU is the culprit ... too old.

Regards. Thank you for your help.

PD. Sorry for my English. I'm from Spain.
 
Yes, sounds like the CAPs are going bad in the PSU.
What brand PSU is this?
Do you have access to a volt meter?
 
It is a Cooler Master Silent Pro M600 (I bought it in 2009).

Yes, I have a volt meter, but I am no expert at all.

I'd rather buy a new PSU, perhaps an EVGA one.

Regards.
 
It is a Cooler Master Silent Pro M600 (I bought it in 2009).

Yes, I have a volt meter, but I am no expert at all.

I'd rather buy a new PSU, perhaps an EVGA one.

Regards.
For $15 or $20, you should be able to buy a power-supply tester. I think you need an old but functioning hard disk to connect to it while it's connected to the PSU tester. It's something that the electrically-skittish who might not feel comfortable with a digital multi-meter can do. On the other hand, it's just more crap to buy and put in a toolbox you'd rather not fill.

But 2009 "start-of-service" date should say enough. I have a Seasonic 850W "Gold" 80-plus or whatever in a 5-year-old box I'm selling to a friend as "the whole enchilada, double-caster braked wheels and all." It's been great, and continues to be great. And my friend knows how old it is, and about the PSU. He's getting a great deal, because I'm giving him a good deal.

I wouldn't sell it to someone who might call me six months later with crocodile tears and a panic about "something is wrong with my computer!"

I've had good Seasonics go bad, just outside their 5-year-warranty. They undergo capacitor-aging. Sooner or later, they need to be diagnosed and replaced, or simply replaced if you expect to get anything more out of the board, CPU, RAM and so forth. And letting a computer sleep without hibernating for more than a couple hours at a time* will accelerate the wear and tear on a PSU.

* Like days at a time . . .
 
It is a Cooler Master Silent Pro M600 (I bought it in 2009).

Yes, I have a volt meter, but I am no expert at all.

I'd rather buy a new PSU, perhaps an EVGA one.

Regards.

2009? Most likely time for a new power supply. I still have a Seasonic from 2009 that is going strong in my HTPC. I'm pretty sure it has a 7 year warranty, but that is up by now. Thing was I hadn't even thought of it until you posted this.
 
Most certainly a capacitor problem. Technically it's probably fixable but you may not have the inclination to do so, vs just buying a new supply.
 
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