MSI GF62 nie włącza się

First of all, sorry for not answering for so long but I was waiting for parts. I replaced PQ19, PQ20 and PU2. I connected a cable between 2 pin PQ19 and 2 pin PQ20.
Now, when I turn on the mainboard after connecting the power supply, the current consumption is 0.45A, the blue LED is on, the fan from the processor turns on. The board turns off after 45s.

In the period that it stays on, what voltage do you have on all the coils.

Not on everyone.

Choke 1 - 0
Choke 2 - 4,02 V
Choke 3 - 1,12
Choke 4 - 0
Choke 5 - 0
Choke 6 - 1,16 V
Choke 7 - 1,16V
Choke 8 - 1,03 V
Choke 9 - 5,1 V
Choke 10 -3,38 V
PL3 - 1,12
PL4 - 0
PL5 - 0
PL6 - 0
PL7 - 0
PL8 - 0

Measure the voltages on pins 1, 5, 6, 17 of PU5.
Measure the voltages on pins 4, 6, 7, 8, 9 of P1, PU7.

PU5
1 - 0,59V
5 - 0,59V
6 - 1,79V
17- 3,37V

P1
2 - 0,79V
3,4 - 2,51V
5 - 3,37V
6 - 5,09V
7 - 0,55V
8 - 3,29V

There is no PU7 on my board.

Recheck the voltages on PQ19, PQ20 if they are different from those previously communicated.

PU19
1 - 5,08V
2 - 1,99V
3 - 5,08V
5 - 4,79V
8 - 19,22V
29 - 5,08V
31 - 5,08V

PQ20
1 - 5,08V
2 - 1,99V
3 - 5,08V
5 - 4,77V
8 - 19,33V
29 - 5,08V
31 - 5,08V

You can measure the resistance to ground on PL4, PL5 without the CPU.

Unfortunately, I don't have that option.

Disconnect all power sources, including RTC battery, and short G13 for 20 seconds.
Test if you get any voltage on the 0V coils, if not:
Replace the bios and remember to save the old one.

I did everything you wrote, but unfortunately nothing changed. I also reprogrammed KBC chip. Did not help.

Voltages appear to be correct. I would try another CPU.

I am very grateful for your help, another very valuable lesson for me. Possible replacement of the CPU with a new one is too expensive for my client. I close the topic.