RAR archive holding a BIOS dump for a Dell board numbered 19861-1, a Wistron-style designation, marked OK in the name. At 8.64 MB compressed, the exact contents and flash size are not stated, so unpack it and inspect the files before use. Images like this are written to the SPI chip with a programmer such as CH341A when the laptop will not start or the BIOS is damaged. Compare the board number on the motherboard, read and save the original chip first, and ensure the image 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 @generalbios. 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 →