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

[qasim94]

Hello, my device is a yoga x1 th4. The device works with fan, the keyboard flashes, and the white power button, but there is no image display at all. The attached file. Please help.
FX490 NM-B861
Rev: 1.0
2019-03-28

[peste]

Hello, my device is a yoga x1 th4. The device works with fan, the keyboard flashes, and the white power button, but there is no image display at all. The attached file. Please help.
FX490 NM-B861
Rev: 1.0
2019-03-28

post S/N, TYPE,etc.

[qasim94]

post S/N, TYPE,etc.

Hello, the type and sn are deleted from the device. I don't know it.