PC no longer powers on.

Soldato
Joined
18 Oct 2002
Posts
4,728
Location
Kent
My system was running fine yesterday but when trying to turn it on today it just seems to continually try to power on then turn off then try powering on again etc etc.

I've tried unplugging the PSU for a minute but that changed nothing. If I had to guess at a culprit it would the PSU since it has to be at least 10 years old now.

I'm not sure what else I can to troubleshoot this except buy a new PSU and hope that sorts it.

Below is a short video of what it's doing.

 
disconnect the usbs as well
may be a damaged usb port
how old is the board?
even needing a new cmos battery can cause weird stuff
where in kent are you @Goose
may be able to lend you a psu for testing
if disconnecting stuff doesnt help
if youre close enough to me
 
@Mcnumpty2323

Turns out its not the PSU, I had an old CPU and motherboard knocking about and thats powered up fine using the same PSU. I had tried booting my main rig without the drives, GPU, RAM etc and the problem remained so I guess that narrows it down to either a faulty motherboard or CPU.

I’ll get hold of a new CMOS battery and see if that sorts it. The hardware is about 8 years old so I guess it could be a dead battery.
 
@Mcnumpty2323

Turns out its not the PSU, I had an old CPU and motherboard knocking about and thats powered up fine using the same PSU. I had tried booting my main rig without the drives, GPU, RAM etc and the problem remained so I guess that narrows it down to either a faulty motherboard or CPU.

I’ll get hold of a new CMOS battery and see if that sorts it. The hardware is about 8 years old so I guess it could be a dead battery.
Yeah cmos battery would be possible
Given the age
At least that's a very cheap thing to try
 
@Mcnumpty2323

Turns out its not the PSU, I had an old CPU and motherboard knocking about and thats powered up fine using the same PSU. I had tried booting my main rig without the drives, GPU, RAM etc and the problem remained so I guess that narrows it down to either a faulty motherboard or CPU.

I’ll get hold of a new CMOS battery and see if that sorts it. The hardware is about 8 years old so I guess it could be a dead battery.
I was just about to say it's unlikely to be the psu if it's shutting down and switching on again. Realistically if you can't get the pc to boot correctly by removing the cmos and resetting the bios, you're highly unlikely to be able to tell whether it's the board or the cpu, assuming you've already ruled out the ram of course.

Funnily enough, my PC gave up the ghost last week with almost exactly the same problem. Endless boot cycling. My board has a backup bios and sometimes I can just catch the bios restore screen flash up before it reboots again, endlessly. I've ruled everything out bar the board and cpu. So yeah, that's been fun lol
 
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Replaced the CMOS battery and the PC powered normally successfully but only once, every subsequent attempt results in the same power on/off cycle as before :(
 
Replaced the CMOS battery and the PC powered normally successfully but only once, every subsequent attempt results in the same power on/off cycle as before :(
My Asus X99 + 5930K PC had issues powering up, would take 3 or 4 attempts to get it to boot. The clock was always wrong which made me think the battery had gone. I changed it and it was fine, it never boot looped though. I would try clear CMOS, maybe the BIOS got messed up.
 
I dont suppose anyone knows of any forum members who might be willing to try and determine if its my CPU or motherboard that's died if I sent it to them?
 
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