Strange problem GA-H110M M.2

[khelane]

Hello
A GA-H110M M.2 motherboard
due to image corruption
This motherboard works sometimes, and after half an hour or an hour, the image is corrupted and shows color lines and the system hangs, most of the time it happens in the BIOS as well.
With Pliers graphics, the situation is worse and it shows more lines, with Machza graphics it shows only one or two colored lines.
Replaced RAM
Replaced processor
BIOS programmed
The completely cleaned motherboard has no visible defects and no traces of burning or heat can be seen or felt inside the board.
At the end, when it hangs in the BIOS and the image is corrupted and noisy, the command to restart the motherboard is given. After 5-6 seconds, the system restarts with a delay.

[khelane]

Video of this problem

[прямо]

Check the CPU VRM phases when the anomaly is happening. You need an oscilloscope for this.

Did you inspect with a thermal camera? because you said no heat can be seen...

and you also said no heat can be felt anywhere on the board? Not even the PCH? usually PCH is very warm (which is why they often fail)

[khelane]

Check the CPU VRM phases when the anomaly is happening. You need an oscilloscope for this.

Did you inspect with a thermal camera? because you said no heat can be seen...

and you also said no heat can be felt anywhere on the board? Not even the PCH? usually PCH is very warm (which is why they often fail)

I don't have an oscilloscope. But the voltages are not a problem during abnormality and are stable.
I don't have a thermal camera. I did this by feeling.
PCH is heated but not hot.
I talked to two repairmen, their opinion was on PCH. I heated PCH with heater and flex. Now, after three days, it works with onboard graphics!
But I have to do the reball.
tnx