Firmware archive named E420 with LLW1 and 10282 in the title, 2.18 MB in size. The name gives no brand or board number; E420 could refer to more than one product, so identify the device carefully, and the trailing codes are likely a project or build identifier but cannot be confirmed. Use the image to recover a BIOS chip via an external programmer. Back up the original contents first and check that the dump size matches the flash chip capacity on 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 @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 →