Computer Restarts Constantly

Scott_1993

Scott_1993

Scott_1993

Associate
Joined
11 Oct 2022
Posts
6
Location
Glasgow
Hi

Having a weird problem. My PC started restarting by itself and gradually got worse to the point where it won't come on for more than a few seconds and the screen won't display. No consistency in when it was crashing, booting, gaming,idling were all possible.

I replaced the PSU (650w), replaced CMOS battery and reseated the RAM (16gb, tried individual sticks, in different slots) before conceding defeat. Sometimes it would stay on for a few mins, sometimes not, sometimes up to 30-40 mins.

I took it to a well regarded repair shop who ran it for 24 hours non stop and stress tested it. They reconnected all hardware and cleaned it thoroughly. They said it was working fine, just thought it was a loose connection or heat.

Got it home today and it restarted again in seconds. Tried different power cables to no avail in case it was that.

Any ideas what is happening here? Some sort of wiring voltage issue in my house or some reason it didn't break down in the shop? Very puzzled here so any ideas are appreciated. I have emailed them back so will see if they want it in again.

Thanks, Scott
 
The only difference I can think of is things like power strips, UPS, which are faulty and you use at home, or peripherals like mouse, keyboard, wireless adapter, but none of that seems very likely to cause this.
 
Scott_1993 said:
Thanks, should have said. I plugged it in without peripherals all around the house and still the same.

Totally baffled but thanks for the reply!
Click to expand...

If it was a loose connection, I suppose it is possible that moving the PC again may have caused the problem to re-occur. They could also have used the PC in a different orientation, which forced the loose thing to connect better.

Do you have a very heavy graphics card, or a very heavy cooler?
 
I don't think so as they said it was the PSU to motherboard connection which is rock solid just now. Could reseat RAM again I suppose. Orientation is interesting.

No heavy loads in cooling or graphics. PC has been fine since I moved here a year ago and had it 4 years or so prior.
 
I had/ have this same issue. Still haven’t resolved it after couple years.

What’s strange is it comes and goes. I have yet to find a pattern to resolve it. It doesn’t happen much now. I have tried absolutely all sorts to resolve it but nothing as of yet.

I’ve seen a few posts on here about random restarts as well.
 
Yeah it's weird, like today it hasn't loaded at all but sometimes it would previously. Think it is getting worse. Kept thinking I had solved it with RAM or power. Very frustrating.

Now spent money on being told it is fine.

Getting an electrician out soon so will ask them if they can test the cables or whatever else they can for the sake of completeness.


Did you find anything that helped at all?

Just very frustrated/confused.
 
Have tried to reconnect all cables then retest. Then reseat ram followed by gpu. If your confident enough and have some thermal paste laying around you could also try reseating cpu.
This will help eliminate all issues regard seating issues and loose cables. You could also try removing motherboard from case and testing outside of case on non-conducting surface.
 
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Yeah not super confident about removing mobo to be honest. Just don't get how it worked in the shop all day I even used a new power cable on it to check it wasn't something stupid.

Not knowing the issue is driving me a bit crazy but I'll keep trying
 
If you can get it on for long enough try and check the event log.

Is it actually posting or just on and then off again without even seeing MB splash screen ? Could be a short maybe MB standoff touching something it shouldn't be making it short ?
 
Yeah I had thought that a UPS might work. Got an electrician coming later this month to check something so I'll ask him then. Lived here a year without issue though and nothing else is affected.

I can get to the event log occasionally and it says Kernel Power and that the system shut down unexpectedly.
 
I was having intermittent restarts on my itx build. Turned out to be a riser cable to the graphics card starting to work loose and any small bang on the table restarted the computer. Had been working fine for about 3yrs before this started.
 
Hi Scott_1993, I'm a very long time lurker on these forums and think i can help!

I seen an issue like this a long time ago and it was down to the cable on the reset switch on the case causing a short which caused constant re-starts.

What you could try first is to disconnect the reset switch cable from the motherboard header and see if that helps and power up the PC and run as normal, also it could be your power switch doing the same thing too.

If your motherboard has the feature of onboard power and reset buttons then you can test the system with either the reset or power cables disconnected from the motherboard header and from there check for stability.

It may not be the cable, it could be the switch it'self faulty! These cables are not hard to find online and are cheap to replace so it's an easy fix hopefully.

I hope this helps!
 
I discovered that it was a too aggressive under volt.

I was running it at -0.2v offset with a LLC mode of 3.

This was a hint to the issue because it was only crashing when idle. LLC pumps the voltage up under load and it was 100% stable whilst gaming.

Set it to a manual -0.1v offset with a manual 1.1V SOC voltage and the pc is golden.
 
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