Firmware archive whose name refers to PCB Nb2566 MB V4 and the model code TP420UAAS, marked New, in a 4.95 MB RAR. No brand is stated, and the name does not identify the flash chip or its capacity, so check the contents before use. A dump like this is written to the board SPI chip with a hardware programmer to fix corrupted firmware. Compare the board marking on the PCB with the V4 designation, keep a backup of the original chip, and make sure the image size equals 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 →