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Ask Lenovo ThinkPad P1 Gen 4: motherboard LCH-1 P-GPU MB213013-1 448.ONL20.0011

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Which of the chips needs to be rewritten? From your file I see that it is the GigaDevice one? Is there a special procedure for the two-chip ones like this one?
 
With this bios version the laptop does not start at all, it powers up but does not start, the bios is powered, the voltages are present on the motherboard, but when the power button is pressed, it does not react at all. With the old bios it started, coolers, keyboard lighting etc.
 
Can you help me fix or repair this BIOS?

Lenovo Thinkpad P1 Gen 4 (type 20Y4 ) 213013-1

I tried other BIOS files from this thread, but it only turns on with my bad BIOS. It turns on automatically when I connect the charger, but no picture, not reacting to the power button. Sometimes the ESC, F1, F4 blinks when it turns on from the battery. Nothing happens with other BIOS files, not even turns on.

Thank you!
 

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szepesif said:
Can you help me fix or repair this BIOS?

Lenovo Thinkpad P1 Gen 4 (type 20Y4 ) 213013-1

I tried other BIOS files from this thread, but it only turns on with my bad BIOS. It turns on automatically when I connect the charger, but no picture, not reacting to the power button. Sometimes the ESC, F1, F4 blinks when it turns on from the battery. Nothing happens with other BIOS files, not even turns on.

Thank you!
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