BIOS archive for the Dell Latitude 5520 on board 213253-1, a number in the Wistron format, marked as working. The roughly 30 MB RAR probably holds a large SPI image for this generation, though the name does not list the contents. Use it to reprogram the flash chip with an external programmer when the board fails to boot. Check the board label, compare the image size with the chip capacity, and dump the original chip before overwriting it.
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 @schematiclaptopramkushwaha. 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 →