Unlocked firmware for the 900SD netbook motherboard, delivered as a 668 KB RAR archive. Technicians use these images to bring back boards with a corrupt or password-locked BIOS, writing the binary to the flash memory with a programmer and clip or after desoldering the chip. Dump and archive the original contents before erasing anything, confirm the board marking matches the 900SD, and check that the image length corresponds to the flash chip size, otherwise the write will fail or brick the board.
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 @schematicslaptop. Enginerys does not host this file.
All sources (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 29 Dec 2020 | Open file on RM Schematics |
| @LaptopsBoardview | 23 Jan 2021 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @boardviewsandachematics | 2 Sept 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 4 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 14 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 →