BIOS and EC firmware set for a V420A notebook on the C46 MB NPB board, version D, specifically the variant with an Intel CPU, packed in a 1.6 MB RAR archive; TOP in the name likely refers to board side or vendor. Having the embedded controller image matters when the unit shows no power, charging or keyboard faults. Flash both with a programmer after backing up the original chips. Confirm Ver D and the Intel processor on your board, since other C46 revisions may need different files.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 30 Dec 2021 | Open file on RM Schematics |
| @pepeelectronica | 21 Apr 2022 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 3 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 →