BIOS for the Lenovo B575E laptop with the board reference 48.4VV01.011 in the name, supplied as a 2.38 MB RAR archive. The 48.4xxxx.0xx format is the PCB numbering used by Wistron, which builds many Lenovo budget models, so the code identifies the main board and its revision. Use the image to recover the SPI flash with an external programmer when the machine shows no boot. Check that the printed board number matches, keep a backup of the original chip, and ensure the dump size equals the chip capacity.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 1 Oct 2020 | Open file on RM Schematics |
| @ITHINKHS | 8 Oct 2020 | 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 →