Dynabook Satellite Pro C50-H15210

[Pook]

After flashing BIOS, my Dynabook Satellite Pro C50-H15210 can't switch on.
Blue LED mean there's power.
I suspect the BIOS got corrupted (strange, because the verification process passed).

Anyway, looking for your help to flash it back.

• Model Dynabook Satellite Pro C50-H15210
• Serial 31214905H
• Link of the new BIOS: https://support.dynabook.com/support...4&osId=3333785
• see attachment of my BIOS dumped by the ch341a_spi programmer.
• the flash is from Winbond W25Q128.V, 16384 KB

[Pook]

more information:

• Model Dynabook Satellite Pro C50-H15210
• P/N: PYS33U-012022
• Serial Number: 31214905H
• Mother board IP3_IN16_MB_V21_20200831A
• Link of the new BIOS: https://support.dynabook.com/support...4&osId=3333785
• see attachment of my BIOS dumped by the ch341a_spi programmer.
• the flash is from Winbond W25Q128.V, 16384 KB
• BIOS Before windows flashing (without backup) IN16V1.13 x64

Looking for dump / and/or serial modification
I found the BIOS version 1.13 as originate, but unfortunatelly I am under Linux, and I can't extract the .ROM / .BIN. Could anyone extract it for me ?
Also, for Dynabook / Toshiba Satellite Pro, how does the serial number be writen in the BIOS file ?

Thanks you