Working BIOS dump for the LG4858 UMA motherboard, board number 11291-1, a pattern associated with Wistron designs. UMA indicates the integrated graphics version without a discrete GPU, so do not use it on a dedicated graphics variant. The 4.28 MB rar is intended for reflashing the SPI BIOS chip with an external programmer. Read and keep the original contents first, compare the board number on the PCB, and verify the image size equals the capacity of the installed flash chip.
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 @biosarchive. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 9 Dec 2023 | Open file on RM Schematics |
| @generalbios | 17 Dec 2023 | Open file on RM Schematics |
| @generalbios | 14 Jul 2024 | 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 →