ThinkBook 16 G4+ IAP Laptop - Type 21CY

[d0gan]

Hello,

Hope somebody can help with this: ThinkBook 16 G4+ IAP Laptop - Type 21CY

power button lights up, keyboard backlight comes on, the fans are spinning. However no video on the screen. Tried with new LCD-panel but no luck. I assume the bios is corrupted on this computer.

Could someone, please provide a clean/updated bios bin for this computer? I attached the original bin file here. Thank you.

Serial# YX07Z1B3

[peste]

Hello,

Hope somebody can help with this: ThinkBook 16 G4+ IAP Laptop - Type 21CY

power button lights up, keyboard backlight comes on, the fans are spinning. However no video on the screen. Tried with new LCD-panel but no luck. I assume the bios is corrupted on this computer.

Could someone, please provide a clean/updated bios bin for this computer? I attached the original bin file here. Thank you.

Serial# YX07Z1B3

bios extracted from the update site Lenovo penyru BIOS Update for ThinkBook 14 G4+ IAP, ThinkBook 16 G4+ IAP

DMI 375000 - 376000

[masterluo]

Hey bro, I meet the same problem, what is the bios ship on this laptop? "Winbond 25R64JVSIQ" ship or "XMC 25QH128CHIQ" ship？ Thank u

[titanium7]

Hello
I'm looking for a clean BIOS file for my Thinkbook 16 G4 +IAP S/N: YX07BNG5
I forgot my supervisor password (BIOS)
Here is my original file

25r64.zip

[peste]

Hello
I'm looking for a clean BIOS file for my Thinkbook 16 G4 +IAP S/N: YX07BNG5
I forgot my supervisor password (BIOS)
Here is my original file

25r64.zip

post S/N, full name and model, motherboard model, TYPE,etc.

[hardware1]

Hello
I'm looking for a clean BIOS file for my Thinkbook 16 G4 +IAP S/N: YX07BNG5
I forgot my supervisor password (BIOS)
Here is my original file

25r64.zip

Write what peste asked you for. Also look for another 16MB chip on the motherboard and upload its file.

[titanium7]

S/N, full name and model It's in my post.
MTM:21CY0076GE
MO:YXN0B3715011
Where can I find the motherboard number?
There is still a chip 25Q80 with this content installed
25q80.zip

[hardware1]

S/N, full name and model It's in my post.
MTM:21CY0076GE
MO:YXN0B3715011
Where can I find the motherboard number?
There is still a chip 25Q80 with this content installed
25q80.zip

This 1MB chip is for Thunderbolt Firmware, solder it back and search for another 16MB chip (128Mbit), it could be in SOIC8 or WSON8 package.

[titanium7]

I found it:
Winbond 25Q128JVSQ
Here's the file (read from the board)
Verify is OK

[hardware1]

I found it:
Winbond 25Q128JVSQ
Here's the file (read from the board)
Verify is OK

This BIOS will erase your Password. You have to flash both files (16MB+8MB) and just solder back the 1MB chip.

[titanium7]

Can I program the chips in the board?

[titanium7]

Both chips programmed externally.
Verification was OK.
Notebook won't start. LED only lights up briefly.

[titanium7]

just solder back the 1MB chip. ??

[hardware1]

just solder back the 1MB chip. ??

Yes, just solder the 1MB chip back don't erase it.
It's better to flash the chips outside the motherboard and choose verify after programming them.

[titanium7]

I didn't do anything with the 1 MB chip and soldered it back on after you said it had nothing to do with the BIOS. I flashed both of your files.
When I turn it on, the LED lights up for about 5 seconds and then goes out again.
After that, it lights up several more times for a few seconds, then everything goes off again.
The fans are constantly off.
Before flashing, the notebook started normally with Windows 11,

[hardware1]

I didn't do anything with the 1 MB chip and soldered it back on after you said it had nothing to do with the BIOS. I flashed both of your files.
When I turn it on, the LED lights up for about 5 seconds and then goes out again.
After that, it lights up several more times for a few seconds, then everything goes off again.
The fans are constantly off.
Before flashing, the notebook started normally with Windows 11,

You can flash back your original BIOS (16MB+8MB) and see if it's will work or not.

[titanium7]

that doesn't work anymore

[hardware1]

that doesn't work anymore

So there is something wrong happened to the device. Let us know which SPI Programmer do you use? Are you using a clip/clamp or de-solder the chips from the motherboard? Do you choose verify after programing the chips and it pass successful? What is the full number of both chips? If you can send a close and clear image to your chips on the motherboard will be good. Finally what is the motherboard number?

[titanium7]

I use a CH341A programmer.
Chips were programmed externally using Neoprogrammer and ASPROG.
Verification was OK every time.
Chips are:
Winbond 25Q128JVSQ
Gigadevice 25R64CSIG
Mainboard number: 5B21H68229

[hardware1]

I use a CH341A programmer.
Chips were programmed externally using Neoprogrammer and ASPROG.
Verification was OK every time.
Chips are:
Winbond 25Q128JVSQ
Gigadevice 25R64CSIG
Mainboard number: 5B21H68229

Just for your information, your laptop should works fine on the files that I sent or using your original backup. Everything looks fine according to the information you gave, but perhaps you rotated the chips, swapped them with each other, the chips got damaged or you moved a tiny component from the motherboard by accident.