PC won't turn on after shutdown, have to unplug it

[Enormous]

Hi,

After I finished my build, I have some problems with my pc. Whenever I turn off the pc (correctly, from Windows), I can't turn it on again, I press the power button and nothing happen. I can turn it on only if I unplugged it completely and wait for like 1-5 min. What could cause this? I have read it's about PSU and Mainboard. But I'm not sure since I once tried to put a CMOS battery while pc is running, and the battery touched some little silver thingy on the board (image link below, same model), it burnt and leave a burnt mark. For PSU, my PSU works fine except for that problem, gaming without crashing or shutting down. Thanks a lot!

My spec:
CPU: Ryzen 5 5600
Mainboard: ASUS Prime B450M-K
Ram: XPG 32GB
PSU: Antec NE550G

 

[pavle]

...But I'm not sure since I once tried to put a CMOS battery while pc is running, and the battery touched some little silver thingy on the board (image link below, same model), it burnt and leave a burnt mark. For PSU, my PSU works fine except for that problem, gaming without crashing or shutting down. Thanks a lot!

There's one of your problems, the other could be - are the RAM and the board compatible (check on ASUS page), any graphics cards in the system?

 

[Bill_Bright]

once tried to put a CMOS battery while pc is running

I don't understand why you would ever think that would be okay. Did someone tell you that? If so, don't ever listen to them again - at least not about computers or other electronics.

Always, as in EVERY SINGLE TIME, power off AND UNPLUG the computer from the wall, then touch bare metal of the case interior before reaching in and before removing or inserting the CMOS battery.

So is that the same motherboard? If so, you might have permanently damaged it?

If it is the same motherboard, why did you remove the CMOS battery in the first place? It is not something you normally have to do with new motherboards as the battery would be new too. And of course, resetting the CMOS can be done by shorting the two CMOS reset pins with the jumper.

I would double check to make sure all the cables are connected properly - including the front panel cables. If fine, I would try a different PSU?

Did this system ever work correctly?

 

[Enormous]

There's one of your problems, the other could be - are the RAM and the board compatible (check on ASUS page), any graphics cards in the system?

Yes, my ram is on the compatible list. I also have gpu installed, Gigabyte RTX 2060 6 gb.

I don't understand why you would ever think that would be okay. Did someone tell you that? If so, don't ever listen to them again - at least not about computers or other electronics.

Always, as in EVERY SINGLE TIME, power off AND UNPLUG the computer from the wall, then touch bare metal of the case interior before reaching in and before removing or inserting the CMOS battery.

So is that the same motherboard? If so, you might have permanently damaged it?

If it is the same motherboard, why did you remove the CMOS battery in the first place? It is not something you normally have to do with new motherboards as the battery would be new too. And of course, resetting the CMOS can be done by shorting the two CMOS reset pins with the jumper.

I would double check to make sure all the cables are connected properly - including the front panel cables. If fine, I would try a different PSU?

Did this system ever work correctly?

My big mistake and I regret it. The reason why I replace the cmos battery is I got this board second handed (returned from RMA) and the previous owner told me that cmos battery might need to be change. The problem I mentioned above (not turning after shutdown) happened before. But as I have read, it might be because of cmos battery, so that’s why.

I have checked, all seems to connected properly. Sadly, I don’t have any spare psu.

No, this problem happens on the first run (just finished this built 1 days ago).

*I forgot to mention that the psu is also second-handed

 

[pavle]

Now that you mention the PSU being older and RAM compatible, it would really be prudent to test with another PSU.

 

[Bill_Bright]

My big mistake and I regret it.

Well, serious respect to you for admitting that!

You were able to speak to the previous owner after a RMA? That is very odd.

Typically, if the CMOS battery is bad, it still starts to boot then results in a checksum error, cannot find boot error, or some other error.

A common mistake is to insert an extra standoff in the case under the motherboard. Removing everything from the case and assembling the computer on an unfinished bread or cutting board, then seeing if it will boot may help determine the problem.

 

[Franz]

I had the same problem with my evga psu, switched to a new rm550x and problem solved.

 

[delshay]

Hi,

After I finished my build, I have some problems with my pc. Whenever I turn off the pc (correctly, from Windows), I can't turn it on again, I press the power button and nothing happen. I can turn it on only if I unplugged it completely and wait for like 1-5 min. What could cause this? I have read it's about PSU and Mainboard. But I'm not sure since I once tried to put a CMOS battery while pc is running, and the battery touched some little silver thingy on the board (image link below, same model), it burnt and leave a burnt mark. For PSU, my PSU works fine except for that problem, gaming without crashing or shutting down. Thanks a lot!

My spec:
CPU: Ryzen 5 5600
Mainboard: ASUS Prime B450M-K
Ram: XPG 32GB
PSU: Antec NE550G

It's possible you may have a motherboard fault like what i'm currently running. Follow these instructions to test if it's a motherboard fault.

Turn the computer off as normal, via the power switch or you can just cut the power off completely via the power switch on the back of the PSU. Then turn back on straight away, push the power on the front of the computer it may still fail to come on.

**Now try this** Unplug the 24 pin power lead from the motherboard then plug it straight back in, now push the power button on the front of the computer & it should start-up.

NOTE: This does not fix the fault, it just removes waiting five mins. Report back if un-plugging/ re-plugging the 24 pin power lead make the computer start straight away other than waiting five mins.