Question PC won't turn on, dealer says it's a CPU problem but I'm not so sure ?

[mahela007]

Hi
Here's the background:
My PC has an AMD Ryzen 3500G processor and an Asus B450M motherboard.
It was working fine until last year, it suddenly refused to boot. (One think I noted here was this was mostly on rainy days with high humidity).
There was no POST beep.
The fans did not come on
And the hard drives didn't spin up.
However, the power light on the GPU was on.
It simply didn't respond to the power button. I tried using a paper clip to 'jump' the PSU even while it was plugged in to the mother board but even that didn't work. (Dangerous, I know..)

Anyway, back then, I used a hair dryer to warm up the PC and eventually it would turn on. This happened a few times untill eventually, it stopped working all together. I took it to the dealer and they replaced the motherboard with the same model and the problem was solved... but it didn't last.
The the same thing happened again this year. (Again during the rainy season with humidity around 90% according to Google) .

For a few days the PC refused to boot every now and then, but each time, instead of using a hair dryer, I turned the AC on and after about half an hour, the PC turned on. This happed a few times but two days ago, again my PC stopped turning on for good.
Personally, I feel like it's a humidity issue causing problems with the motherboard.

I doubt it's a PSU issue because the power light in my GPU is on and the PSU passed the paper clip test.

So I took the pc to my dealer again and he says this is a known issue with AMD processors and boards. He said this before he even checked anything and said I'll have to replace both the CPU and the motherboard.

I find his explanation quite unlikely becuase if it was a CPU issue, replacing the board the first time around shouldn't have worked, right?

Anyway, what is your take on this? Could it be an (expensive) CPU problem for a motherboard problem?

 

[Lutfij]

Welcome to the forums, newcomer!
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model.

I tried using a paper clip to 'jump' the PSU even while it was plugged in to the mother board but even that didn't work. (Dangerous, I know..)
You could simply source(borrow, not buy) another PSU that's reliably built with more power than the entire system needs, in order to see if the issue was your PSU, motherboard or CPU without trying to ruin any other component during a troubleshooting phase.

 

[mahela007]

Welcome to the forums, newcomer!
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model.

I tried using a paper clip to 'jump' the PSU even while it was plugged in to the mother board but even that didn't work. (Dangerous, I know..)
You could simply source(borrow, not buy) another PSU that's reliably built with more power than the entire system needs, in order to see if the issue was your PSU, motherboard or CPU without trying to ruin any other component during a troubleshooting phase.

CPU: Ryzen 3500G
CPU cooler: stock, air cooled
Motherboard: Asus B450M
Ram: Teamgroup DDR4 (or 5 can't remember) 16 GB
SSD: 80GB Seagate, HDD : 1TB western digital
GPU: Nvidia RTX 2060
PSU: can't remember the specs sorry. Definitely had enough power. I know becuase I upgraded when I bought the GPU. PC isn't with me now so i can't check :/
It's about 2 years old

Chassis: unbranded
OS : dual boot Linux mint and windows 10
Monitor: Lenovo 160Hz

 

[Misgar]

Operating computers above 80% RH is not recommended. There's too much chance of starting up the machine with small water droplets (condensation) forming on components, leading to potential short circuits and permanent damage.

Ideally you need to reduce the humidity level in the room and allow the computer to dry out for an hour or two, before plugging the power lead into the mains outlet. Unless the ATX PSU or laptop PSU is completely isolated from the mains, the motherboard will remain powered up in standby mode, even when the PC/laptop is supposedly switched "off".

Alternatively, you could fit a small heating element inside the computer case (10 to 20W) to keep the air inside warm and reduce the possibility of condensation forming. The element should be left on all the time the computer is not not running Windows, etc., to prevent condensation forming inside.

Other people simply leave their computers switched on and running all the time (not in standby or completely powered off).

Long term high humidity can lead to corrosion of contacts under the gold plating of CPUs and DIMMs. In extreme cases, this eventually destroys the component when power is applied, due to short circuits via corrosion.

https://forums.tomshardware.com/threads/humid-room-turn-pc-off-or-keep-it-on.3465945/