BIOS dump named only by a PCB part number, 48.4RQ01.011, with no laptop brand or model stated, in a 4.99 MB RAR archive. The 48.4xxxx.xxx format is used by Wistron on boards it builds for brands such as Lenovo, Acer and Dell, so locate the same code on the motherboard to confirm a match. The image would be written to the SPI flash chip with an external programmer to recover a laptop with corrupted firmware. Back up the original contents first and verify the extracted file size matches 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 →