BIOS for the X455LD laptop mainboard, revision 2.1, marked OK by the person who supplied it, packed as a 3.36 MB ZIP file. X455LD is an ASUS model naming scheme, with the board revision silkscreened on the PCB. Technicians use such dumps to revive boards with a corrupted SPI flash, programming the chip with a CH341A or a similar programmer. Back up the existing contents first, because they may hold the serial number and the Windows key, and confirm that the revision matches.
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.
All sources (8)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 26 May 2020 | Open file on RM Schematics |
| @biositechyangiyer | 29 May 2020 | Open file on RM Schematics |
| @laptexlaptopbios | 8 Jul 2020 | Open file on RM Schematics |
| @one5technology | 21 Nov 2020 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | Open file on RM Schematics |
| @skclappybios | 10 Apr 2024 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →