Question PC lagging and crashing after dust cleanup

[Ashckroft]

Hello,
Two weeks ago I cleaned my PC from dust using compressed air from can. The only component that I removed to clean up was the CPU fan. After this I noticed some weird lag spikes when i alt+tab or frame drops while in a game.

Today I removed the drivers in safe mode and reinstalled them a new. After the pc restarted the monitor showed no signal and some high buzzing sound appeared through the headphones. At that moment the fans were revving high and low. After one more reinstall everything was ok, but I noticed that when I open a game it laggs for some time and the frames drops half then after few minutes everything gets back to normal. I am completely lost here.
When I open the task bar it shows high power usage on whatever game is opened and high cpu usage. After some time passes by everything goes back to normal vallues.

First time I see this happen and I have no clue what might be the problem.
The PC Specs are:
MB: b450 gaming
GPU:RX580
CPU: Ryzen 5 2500x
RAM: Hyper X 2666 MHZ 2x 16GB

PS: I have re-seated and checked the RAM/GPU/CPU fan today.

 

[Viking2121]

First thing is to shut the PC off and unplug it and make sure the CPU cooler is still fully mounted to the CPU, you could of jarred it loose when cleaning, if you got thermal paste, I'd take the cooler off, wipe it clean with alcohol, let dry and reapply the paste and reinstall the cooler. Make sure the CPU fan is plugged in fully.

While the system is off, make sure everything is still plugged in and mounted right like the GPU, cables for SSD's, HDD's, make sure the ram is seated fully, can take the sticks out, clean the contacts with alcohol again, let dry and install the sticks back into the same slots you took them out of.

Make sure the PSU cables are fully plugged in, check the 24 pin on the motherboard, make sure its fully plugged in and clipped in, same with the EPS 8pin on the motherboard, Make sure the power cable on the GPU is fully plugged in.

See if that changes anything, also did you dust out the PC while it was still plugged in? Even if the power switch on the PSU is off, you still should unplug it epically since canned air can spray liquid, usually not a problem but can be a problem if its gotten into a spot where it shouldn't have.

Good Luck! Hope some of this helps.

 

[Ashckroft]

First thing is to shut the PC off and unplug it and make sure the CPU cooler is still fully mounted to the CPU, you could of jarred it loose when cleaning, if you got thermal paste, I'd take the cooler off, wipe it clean with alcohol, let dry and reapply the paste and reinstall the cooler. Make sure the CPU fan is plugged in fully.

While the system is off, make sure everything is still plugged in and mounted right like the GPU, cables for SSD's, HDD's, make sure the ram is seated fully, can take the sticks out, clean the contacts with alcohol again, let dry and install the sticks back into the same slots you took them out of.

Make sure the PSU cables are fully plugged in, check the 24 pin on the motherboard, make sure its fully plugged in and clipped in, same with the EPS 8pin on the motherboard, Make sure the power cable on the GPU is fully plugged in.

See if that changes anything, also did you dust out the PC while it was still plugged in? Even if the power switch on the PSU is off, you still should unplug it epically since canned air can spray liquid, usually not a problem but can be a problem if its gotten into a spot where it shouldn't have.

Good Luck! Hope some of this helps.

Thank you for the reply, Viking2121.
I did all the cleaning with power switch off and cables out of the pc so no power was running through the system. Today I have checked all the cables and re-seated the GPU and RAM (also cleaned with compressed air the slots). Everything seems normal, no loose cables or anything else, but the problem persists.

 

[Ashckroft]

Update: I did stress test with Heaven benchmark - UNIGINE Benchmarks and the temperatures are in normal range 70C for GPU and under 60 for CPU. Despite that the PC was hard to handle and lagging and freezing.