BIOS dump for the Lenovo G50-45 on board NM-A281, prepared for a GD25Q64 flash chip according to the name. NM- numbers are used by LCFC, the Lenovo-owned ODM, so confirm the code on the PCB. The GD25Q64 is a 64 Mbit (8 MB) SPI device supported by common programmers such as CH341A and RT809H. The RAR is 2.39 MB, so expect a compressed image inside. Read and save the original chip contents before erasing and writing, then verify the programmed data.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @efibios. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @efibios | 30 Jul 2020 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →