Backup set of BIOS and EC firmware for the Lenovo ThinkPad L520, holding both the main system flash and the embedded controller code. No board number or revision is given, so compare against your board before using it. The EC image matters when keyboard, charging or power-on behaviour fails after corruption. Write each image with a suitable programmer, keep copies of the original chips, and check that the dump sizes match the installed flash chips.
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 →