Question System only turns on when removing CMOS battery and putting back in

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tuesday0108

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Mar 31, 2010
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My PC won't power on unless I open it up, remove the CMOS battery then put it back in a minute later. Only after I do this will my PC even power on telling me I need to go into BIOS. Once I do this, Windows 10 pro boots up and everything seems normal until the next morning when I need to turn on the PC again.

I just put in a new CPU (5700x3D) and added 2 more sticks of memory plus installed a Thermaltake watercooler for the CPU. I also used Arctic MX-6 thermal paste.

Did a fresh install, made sure all wires are connected properly.

I've searched around online and some people have the same problem, but no way to fix it until they replaced a motherboard or power supply.

I'd like to add this has never happened prior to upgrading my CPU and adding new sticks of ram plus a new water cooler. My old CPU was a Ryzen 5600x running on 8GBx2 ram and heatsink/fan for the CPU, Windows 10 Pro.

What can I do besides pull my hair out and buy new components?

My system is below
AMD Ryzen 5700x3d
GSkill 8Gbx4 DDR 4 memory 2133 MHz,
ASUS B550 Rog Strix motherboard with latest BIOS just flashed.
2 M.2 sticks at 2tb each.
1 Sata SSD 1tb
XFX 850W black edition single rail power supply (purchased beginning of 2016)
 
Your 8 year old PSU should be replaced. You are essentially resetting the BIOS everytime you do what you are doing.

In a manner, you are also resetting the PSU. Try this next time.

Instead of removing the battery. Disconnect the power cable from the PSU. Then press the power button to discharge residual power in the system. Then, reconnect the power cable and try powering on. What happens?
 
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COLGeek said:
Your 8 year old PSU should be replaced. You are essentially resetting the BIOS everytime you do what you are doing.

In a manner, you are also resetting the PSU. Try this next time.

Instead of removing the battery. Disconnect the power cable from the PSU. Then press the power button to discharge residual power in the system. Then, reconnect the power cable and try powering on. What happens?
Click to expand...
Okay I'll try that. By disconnecting power cable from PSU, do you mean disconnecting the cord on the outside of the system that plugs into the wall or the power cables on the inside of system that connects psu to CPU, SSD, Mobo etc?
 
COLGeek said:
Yes, the power cord attaching the PSU to your outlet.
Click to expand...
Okay, did it. Unfortunately it still wouldn't power up unless I removed the CMOS battery. But something different happened this time. After removing the CMOS battery and powering up, I didn't need to go into BIOS again to run setup. It just loaded Windows 10 like normal.
 
I've been digging around some more and I found the back of the bracket for the AIO watercooler may be touching the back of the metal solder parts of the motherboard. I would attach a photo, but it's only allowing me to link to photos from URL.

Will this cause any issues for me? Also, I noticed my fan plug was wrong. I had the AIO plugged into chassis fan port, and my case fan was plugged into the CPU optional port. I fixed everything and will see if this caused my system not not to power on without removing the CMOS battery.
 
Okay reporting back. My PC booted this morning without issue. what I changed was I plugged the AIO pump into the correct pin on the motherboard. I had it plugged into chassis fan before, and had my chassis fan plugged into AIO pin.

I also plugged my side chassis fan into the correct pin. I used to have it in CPU_OPT pin, now it's connected to chassis pin.

I'll try again tomorrow morning to see if it still boots up properly.
 
tuesday0108 said:
Okay reporting back. My PC booted this morning without issue. what I changed was I plugged the AIO pump into the correct pin on the motherboard. I had it plugged into chassis fan before, and had my chassis fan plugged into AIO pin.

I also plugged my side chassis fan into the correct pin. I used to have it in CPU_OPT pin, now it's connected to chassis pin.

I'll try again tomorrow morning to see if it still boots up properly.
Click to expand...
Fingers crossed for a good outcome.
 
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Okay, so my system had issues turning off last night. When I exited Windows 10, it'll just hang and seemed like the system fans ran at full speed. I held down my power button for 5 seconds, but it wouldn't turn off. Held it for another 5 seconds, and system restarts and boots into Windows.

I then exit Windows again, it does the same thing. Press the power button for 5 seconds again and this time it turns off.


Then right now in the morning it wouldn't power on again. I tried just removing the 2 new sticks of ram (I have 4 sticks total, same brand same model, CL 16, 8GB each Gskill) and it didn't fix it. I had to remove the CMOS battery again for my system to actually power on.

What could it be? I have since RMA'd the ASUS motherboard, but I'm concerned it might not be the issue.

Could this be a faulty motherboard? PSU? My system is 100% fine when it does power on.
 
Satan-IR said:
I agree the PSU is old and needs replacing but have you actually though of replacing the CR2032 (CMOS) battery too? I didn't see anywhere in the thread if you mentioned you already replaced it.
Click to expand...
I can try that, just gotta find a 2032 battery. Does this usually do anything?
 
tuesday0108 said:
I can try that, just gotta find a 2032 battery. Does this usually do anything?
Click to expand...
I have seeen motherboards/systems do strange things when the battery is almost dead. Might not be the cause but replacing it won't hurt either.

It's a coin battery you can find in any store that sells household electric stuff and batteries, digital cameras and that sort of thing.

It's a rather ordinary coin cell bettery like this:
https://www.amazon.com/Rayovac-Lith...qid=1709232478&sprefix=cr+2032,aps,372&sr=8-7

I would also do what @COLGeek suggested.
 
This is odd. As I was doing my morning ritual of opening up my case and removing the CMOS battery in order for the system to power on, I started to pull my PC forward so I can remove all the cords and then I decided to just push the power button one more time and it powered on!

I'm not sure what happened, but I think it has something to do with the cords in the back. Could it be possible that the cords connecting to my PC might have jump started something allowing my PC to power on?

I have 2 display ports connected to the graphics card, 4 USB, power cord, a 3.5mm audio and ethernet wire connected.
 
Something loose!

Carefully inspect your rear panel ports. Look for any obstructions in all of them. Particularly those little ground fingers used with many backplates. Are any poking into USB or Ethernet ports?
 
COLGeek said:
Something loose!

Carefully inspect your rear panel ports. Look for any obstructions in all of them. Particularly those little ground fingers used with many backplates. Are any poking into USB or Ethernet ports?
Click to expand...
Just checked, nothing is loose or poking into the ports. My motherboard has a plastic case that covers the back IO ports so I don't think anything is shorting it.

I just changed my CMOS battery right now.

So far I've noticed I can power down now without issue. I tried powering up twice. first time no issues. Second time nothing happened, but then I pressed the power button again and it booted up.

i'll have to do more testing throughout the day to see if the CMOS battery change solved this.
 
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