Ask Microsoft surface laptop 4 1951 turns on for 10s

[soles]

Hello there!

I have problem with Microsoft surface laptop studio 4 1951. It turns on for 10s shows microsoft logo and then turns off. I can't get into bios, keyboard combiantions are not working.

I replaced battery because it had 0V and PD contoroller TPS65993AD. Now Battery charges and I can turn on laptop from battery or charger but after pressing power button it shows only microsoft logo for 10 seconds and then turns off.

May this be broken bios or this is more likely hardware issue?
Thanks for any help

 

[ThienBui]

May this be broken bios or this is more likely hardware issue?

need try Programming

 

[soles]

I checked rails and I'm missing 1P8VSB_EN rail because SLP_SUS has 0V

 

[soles]

I tried to reprogram BIOS but I can’t write to IC, it is winbond 25R256 and I have CH341 programmer. What programmer I need to program this IC?

 

[saeed levanya]

I tried to reprogram BIOS but I can’t write to IC, it is winbond 25R256 and I have CH341 programmer. What programmer I need to program this IC?

programer EZP2023+

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