Firmware archive for the Masstel L133 laptop, board marking 5133A, revision 4.0. Masstel is a Vietnamese brand whose devices come from outside ODMs, so the board code on the PCB is the most reliable reference. Confirm that both 5133A and revision 4.0 appear on the board before using it. The image would normally be written to the SPI flash with a programmer to revive a board stuck without POST. Read and keep the original chip contents first, and check the dump size against 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.
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 →