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

[Salutit]

It turns on but doesn't display an image.

 

[ThienBui]

It turns on but doesn't display an image.

 

[Salutit]

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?

 

[ThienBui]

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?

only Programming one main bios U2601

 

[Salutit]

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.