X1 Yoga 4th Gen bios

[hoaca388]

Also looking for Bios or fix of current bios for Lenovo X1 Yoga 4th Gen on board GX490 NM-C661
Trying to fix no post no picture

Type is 20SA-0002US
Serial no PF1YSW9M

Bios chip is Winbond 25Q256JVEQ current dump attached

X1 Yoga 4th Gen Laptop (ThinkPad) - Type 20SA

[ruslan657]

Thinkpad X1 Yoga 4th gen
Model: 20QGGS02E00
S/N: PF1SG5DQ
bios help please

[shiyab]

Thinkpad X1 Yoga 4th gen
Model: 20QGGS02E00
S/N: PF1SG5DQ
bios help please

hi try

[ruslan657]

hi try

thank u but not worked

[hoaca388]

Thinkpad X1 Yoga 4th gen
Model: 20QGGS02E00
S/N: PF1SG5DQ
bios help please

X1 Yoga 4th Gen Laptop (ThinkPad) - Type 20QG

[Nebukadnerzar_V]

I am now trying to replace the BIOS Region in my Dump by the BIOS downloaded from Lenovo.

I have identified the correct files for my machine (N2HETxxW) and found 2 files, FL1 and FL2.
As I assume, FL2 is for the EC and FL1 contains the main BIOS.

I just cannot figure out, what to do with the FL1 file. There are many guides out there, that start with removed a small section in the beginning and then ending up with the BIOS file. That does not work for me, since the FL1 is a lot smaller than the dump.

Could someone please provide a guide as to how to proceed with these files?

Thanks in advance!

Attached is the Dump as well as the FL1 and FL2 files from the Lenovo Update Package.

Type: 20QG-S56D00
S/N: PF-1C1BV9