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- S551LN F1 209 (Luirons Bios)BIOS · 3.19 MB · 23 Feb 2021BIOS rar—3.19 MB
- S551LN F1 209 telegram BIOS Repair-2025-09-16BIOS · 3.40 MB · 25 Sept 2025BIOS zip—3.40 MB
- S551LN F1 209
Firmware archive for the ASUS S551LN, with F1 and 209 in the name, most likely a BIOS version 209 for that model, though the name gives no board revision.
BIOS · 3.26 MB · 11 Jun 2018BIOS zip—3.26 MB