Thinkpad Yoga 14 20dn black screen, no bios logo

[yessir]

Hello guys,

I've got recently my hands on a Thinkpad Yoga 14 (20dn) which will not boot up. (black screen, no bios logo)
When I press the power button, the keyboard illuminates and the FN-Led lights up. Also the fan spins up. But thats it, nothing else.

For my understanding it could be a bricked BIOS. Unfortunately I have no exact history about what happened with the laptop.
I disassembled the hole thing to locate the BIOS chip but didn't find it.
The mainboard is a LCB-1 MB 13323-2.
I did a little bit research on the board and found ebay listings with spare boards which have a bios chip but mine didnt.
my board:
https://imgur.com/YspvvT2

ebay listing:
https://www.ebay.de/itm/Lenovo-Think...-/153526028716

Maybe someone has ideas or hints to resurrect this laptop.

Thank you!

[piernov]

Re: Thinkpad Yoga 14 20dn black screen, no bios logo

.

[yessir]

Re: Thinkpad Yoga 14 20dn black screen, no bios logo

.

Hello piernov, thank you for your help. Unfortunately I can't find a supplier that can provide me with this chip. Maybe somebody know a supplier preferably located in Europe.

This are the details:

Device: Lenovo / Thinkpad Yoga 14 / 20dn
Mainboard: LCB-1 MB 13323-2
BIOS-Chip: MXIC / L150515-10G

Thank you very much folks!

[norekfm]

Re: Thinkpad Yoga 14 20dn black screen, no bios logo

Hello

Did You fix the issue ??
I have on table same MB and same behavior

Regards
A