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- asus S551LNF1209 (Luirons Bios)BIOS · 3.19 MB · 23 Feb 2021BIOS rar—3.19 MB
- asus S551LNF1209 telegram BIOS Repair-2025-09-16BIOS · 3.40 MB · 18 Sept 2025BIOS zip—3.40 MB
- asus S551LNF1209
Compressed firmware for the ASUS S551LN; the trailing 1209 in the name looks like a revision or version code but is not explained.
BIOS · 3.26 MB · 19 Aug 2018BIOS zip—3.26 MB