Question Pc powers off by itself whenever it wants to

[iliec37]

Hey, recently I have been facing an issue with my pc.It powers off by itself like its a blackout, except it isn't and it's started getting on my nerves.
The thing is it started to do that after I moved it in another room and cleaned it (dust🙁) and I forgot where 2 screws fit,could the screws be the reason?
Or the internet or the USB mouse .P. S everytime I connect my phone to pc it shuts down(front USB port)
I have windows 10
Installing windows 7 would be my last option, but 2020 is coming and...

 

[Phaaze88]

Just shutting off without warning would be an issue with your hardware.
You should really double check your connections, hard drive, cooler mounts and motherboard standoffs for the origin of the screws.
Full specs?(cpu/motherboard/ram, storage drives, gpu, power supply - don't just type "500w psu", as it's not enough to go on. Need to know the make and model as well.)

 

[iliec37]

Quick question :Could a fan that's been put incorrectly be the problem?

 

[Karadjgne]

Figure out where those "2 screws" actually go. If they happen to be related to holding something in place, and are not there, it's possible you are shorting something out and the psu is protecting your pc by shutting down instantly. Or they could be whats helping hold down the cpu cooler, and not being there temps are climbing until the cpu shuts down. Or they could be nothing more than screws holding a hdd in place, and a moving hdd is causing the problem with corrupted data. Or do absolutely nothing at all. Could be a failing psu, or a bunk fan in the psu that's clogged with dirt shaken loose from the move. Multiple possible causes.
For all you know, the cpu fan wire is stuck in the cpu fan, causing over temp shutdowns.

Go through the pc, replace the screws where they came from and eliminate any possible hardware as being a cause. After that, it's on the software. Check Windows Events Viewer, it's in admin tools, look for the red flagged critical errors, they'll help guide you in the right direction.

 

[iliec37]

Just shutting off without warning would be an issue with your hardware.
You should really double check your connections, hard drive, cooler mounts and motherboard standoffs for the origin of the screws.
Full specs?(cpu/motherboard/ram, storage drives, gpu, power supply - don't just type "500w psu", as it's not enough to go on. Need to know the make and model as well.)

Specs:Motherboard:Asrock n68-GE;6Gb ram; 640 HDD storage; Cpu:Amd athlon 64 x2; GPU:Amd HD 4540 HD series; Power Supply :All I know about it is: AC 230V,Gembird brand, Total output power:up to 450 W.
I'm sorry I can't give more details

 

[iliec37]

Figure out where those "2 screws" actually go. If they happen to be related to holding something in place, and are not there, it's possible you are shorting something out and the psu is protecting your pc by shutting down instantly. Or they could be whats helping hold down the cpu cooler, and not being there temps are climbing until the cpu shuts down. Or they could be nothing more than screws holding a hdd in place, and a moving hdd is causing the problem with corrupted data. Or do absolutely nothing at all. Could be a failing psu, or a bunk fan in the psu that's clogged with dirt shaken loose from the move. Multiple possible causes.
For all you know, the cpu fan wire is stuck in the cpu fan, causing over temp shutdowns.

Go through the pc, replace the screws where they came from and eliminate any possible hardware as being a cause. After that, it's on the software. Check Windows Events Viewer, it's in admin tools, look for the red flagged critical errors, they'll help guide you in the right direction.

The screws are from the case 100%,I just cleaned the dust from 2 fans, and a strange cubic metal thing behind the CPU fan

 

[AllanGH]

The thing is it started to do that after I moved it in another room...

Yes, something may be loose, causing you a problem, or you may need to pull the system apart completely and re-connect everything, to resolve a contact fretting issue....

Then again, you may have something on the same branch circuit (a refrigerator comes immediately to mind) that is causing a power transition when it switches on, which would instigate a shutdown of the power supply.

I am looking askance at the Gembird PSU, quite frankly. It's just one of those generic units that cause a plethora of problems like this one. You may want to consider replacing it, before taking this too much further.

 

[Karadjgne]

I'm suspecting a need to repaste the cpu cooler.
Here's why.
Cheap cpu pastes between the 'cubic' chunk of metal (that's the heatsink btw) and the cpu itself, don't last forever as such. They tend to dry out. This by itself isn't an issue. It's just like the caulk around a window or bathtub, once it's stuck, it's good. But after it dries, if anything causes that seal to break, it'll never be waterproof again, never stick back like it was. Pastes are almost identical in that respect, a dry paste will work just as well as when it was wet, but any hard vibration, knock, movement, bounce or bump of the heatsink and the seal breaks.

Once the seal is broke, it's broke. It's done. Needs to be replaced. Being broke, it won't pass the high temps of the cpu to the heatsink, and the fan won't do anything to cool the cpu. After a while of usage, the cpu overheats and shuts down.

Paste is relatively cheap, $5-$11 a tube usually, and cleaning the heatsink/cpu is easy, 90% isopropyl alcohol and coffee filters. Wipe off both, do not soak the filter just use it slightly damp. There's hundreds of videos, instructions etc online. Then 1 small, grain of rice, sized dab of paste in the middle of the cpu, put the heatsink back on and secure it. Hook fan back up. Done.

 

[iliec37]

Today,the pc started beeping continuously, then turned on, Then before reaching log-in screen it turned off
Now I'm afraid to start it again, it might explode idk