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Thinkpad X1 Yoga 4th gen
Model: 20QGGS02E00
S/N: PF1SG5DQ
bios help pleaseComment
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Any donations to badcaps are welcome, click this link to donate . Thanks to all the supporters
https://www.badcaps.net/donateComment
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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-1C1BV9Comment
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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
2019-03-28Comment
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Every donation made will go towards server fees and maintenance costs.Comment
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Got one with no display issue.
Lenovo X1 YOGA 4TH GEN
board: NM-B861 rev 1
SN: PF1VTB8Q
MODEL: 20QGS15E00
TYPE: 20QG
backup attached... Thanks...Comment
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Hey guys, I need bios
power on but no display
X1 Yoga 4th Gen (Type 20QF)
MODEL: 20QF000YAD
board : FX490 NM-B861 REV 1.0
(intel Core i7-8565U)
SN: PF-1XXFPB (ı am not sure but on the back it writes)
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Hello everyone,
I’m currently working on a dead MSI GP75 Leopard (MS-17E71) motherboard (i7 CPU, NVIDIA GPU) with a no display/no backlight issue initially. After extensive investigation, I’m at a critical stage involving EC firmware, BIOS/ME region interaction, and possible deep corruption. I'm seeking advanced insight from anyone with experience in EC/BIOS sync issues or PCH-level behavior. Here’s a full breakdown:
🧩 Initial Issue- Board powers on (fans spin, keyboard lights up and can be adjusted, caps lock led lights), but no display or backlight
- External display (HDMI) shows
07-24-2025, 02:17 PM -
Hi everyone, hope everyone's having a great day.
I have a Lenovo Thinkpad X1 Yoga Gen 3 for repair. (20LES3T900)
I looked in every corner and the laptop seems fine. Its pulling 500mA but no display, no noise, nothing.
So I assume its a BIOS issue. I downloaded the BIOS with CH341A and opened it on ME Analyser and didn't receive any errors.
Does this mean the BIOS is fine? making it a hardware issue?
I downloaded fresh BIIOS from the Lenovo site and used Hex Editor replace the Lenovo's BIOS into my BIOS region. But the file size ended up being... -
Hello dear forum members,
I own two Lenovo Yoga X1 Gen 4 laptops. One of them had a touchscreen problem, and I tried to fix it by externally flashing the BIOS. Unfortunately, I didn’t save the original BIOS and accidentally flashed it with a faulty one. After that, the device stopped working completely.
I then had the idea to make a BIOS backup from the other Yoga X1 Gen 4 (same hardware) and flash it onto the non-working device.
Nothing was flashed here — the BIOS was only backed up.
I created the backup using a CH341A Black programmer and NeoProgrammer.... -
First of all thanks to all of our members who have posted previously all methods posted here.
Please leave a comment if you find something new,or have anything else to add.
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Find by serial number,model number or series
If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
Operating system and OS version.If... -
I've currently got a Lenovo Yoga Slim 7 14APU8 that is not posting. Its fan spins, the keyboard lights up, and the caps lock doesn't work. It was taken to some shop for cleaning, and then they updated or tried to update the bios. After that, there was no display and no post. I've removed the bios ic from the board and made a bios dump. I need some assistance going forward, as I suspect this is probably just a bad bios issue. I've tried searching for a dump, but no luck; if anyone can throw me a bone, it would be much appreciated!
Attached is the bios dump in the state I received it...
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