Samsung Galaxy Book Pro NP950XDB-KC3US

[dana.repouille]

This BIOS dump came from a Samsung Galaxy Pro NP950XDB-KC3US that will NOT POST. It powers on, has keyboard backlight, fan spin, and a flashing blue LED near the USB-C port.
I don't know if anyone here can clean this BIOS dump for me. I have purchased an identical used motherboard, which will arrive next week. I should be able to get a good BIOS dump from that working board.

Samsung Galaxy Pro NP950XDB-KC3US
Serial Number 5BSK9FERC00150K
GigaDevice 25R127DSIG WFK588 AU212P

[dana.repouille]

I ran the ME Analyzer and the Intel Flash Image Tool against my supposedly corrupt BIOS image above, and created the attached outimage.bin file.
However, when I wrote the image back to the GigaDevice 25R126DSIG chip, the Galaxy Book Pro behaved exactly the same as it did before I went through all this.
As I said, I purchased an identical working motherboard, which will arrive in several days. If it does work, I can clone its BIOS to see if it will run on this faulty motherboard.

[dana.repouille]

Question about these Galaxy Book Pro laptops:
The VENUS-13 motherboard has two BIOS chips.
GigaDevice 25R127DSIG is 16MB.
Winbond 25Q80DVNIG is only 1MB.

Does the smaller Winbond chip contain BIOS code for the EC chip or for something else?
If the laptop will not POST, is there anything I can do to fix this smaller BIOS chip?
Thanks

[SMDFlea]

The smaller chip is for firmware, usually thunderbolt, USB-C etc

[dana.repouille]

I have tried three different BIOS images on this Venus motherboard, and it still will not POST. I powers on with no display, spins the fan, and flashes the blue LED.
I replaced the ME region with two nearly identical clean replacement.
I tried using a factory clean image -- [950XDB] Venus-15 TGL BIOS (P12RFW).
Although I haven't fixed the laptop, I don't think I have failed, since I learned how to use the ME Analyzer and the Intel Flash Image Tool.
Thanks to all who helped.

[dana.repouille]

The smaller chip is for firmware, usually thunderbolt, USB-C etc

I agree. Probably code for the PD controller(s). In the case of this Samsung, it just flashes the blue LED continuously whether it is connected to USB-C power or just running on the battery alone. Since it appears to charge the battery using USB-C power, I am assuming that there are no problems with the PD controller.