| Category | File Name | Download |
|---|---|---|
| Original Backup | ThinkPad/Lenovo - BIOS IBM W520 QM67 N12P-Q1-A1 H0222-4 8MB.bin | |
| Original Backup | Lenovo/Lenovo - W520 (8MB) W520_new.bin | |
| Classic Schematic | Lenovo/Wistron - H0221-1 2011-01-18 KN3 KENDO-3 swg_svt_110118_R1 Lenovo W520 【 Watermark 】.pdf |