P52 (Type 20M9, 20MA) Laptop (ThinkPad) NM-B561 REV 1.0

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P52 (Type 20M9, 20MA) Laptop (ThinkPad) NM-B561 REV 1.0
NS-B561.tvw
NM-B561 REV1.0.tvw
NS-B562.tvw
boardview BIOS Schematics
Lenovo Thinkpad P52 – LCFC EP520 NM-B562-NM-B561 Schematic-Vinafix

Lenovo Thinkpad P52 – LCFC EP520 NM-B562-NM-B561 Schematic-Vinafix
 

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Last edited:
Click to expand...
Need bios files.
Lenovo thinkpad p52 (type 20ma)
Model: 20mas1ef00

Bricked after bios upgrade

U9:
The dumps from this chip were successful and consistent after comparing them.
Found Macronix flash chip "MX25L25635F/MX25L25645G" (32768 kB, SPI)

U29:
The dumps from this chip were successful but after 5 dumps all files were different.
Setting spispeed to 1M software can identify chip.
serprog: Programmer name is "pico-serprog"
Found Winbond flash chip "W25Q80.V" (1024 kB, SPI) on serprog.

Dumps from both chips are in zip.

what is the u29 chip used for?
I currently do not need password removal.

Please let me know if you need more information.
 

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Last edited:
ThienBui said:
Motherboard code ?
Click to expand...
getting this error when flashing ec. u29 is for ec right? or wrong?
Found Winbond flash chip "W25Q80.V" (1024 kB, SPI) on serprog.
Error: Image size (262144 B) doesn't match the flash chip's size (1048576 B)!
 
bds said:
thanks.
So after flashing 32MB n2cuj12w.bin nothing would power up or light up, i flashed my backup and the keyboard lights worked again.
can you think of anything i could try?
Click to expand...
If you are a technician, you must determine where the problem is to fix it, not just program the BIOS
 
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