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- ACER Chrombook CB3-431 P4GCR MAIN rev 2.1BIOS · 1.82 MB · 15 Dec 2024BIOS rar—1.82 MB
- ACER Chrombook CB3 431 P4GCR MAIN rev 2 1 telegram BIOS Repair 2025BIOS · 2.36 MB · 17 Sept 2025BIOS zip—2.36 MB
- ACER Chrombook CB3-431 P4GCR MAIN rev 2.1
Firmware archive for the Acer Chromebook CB3-431 main board, identified as P4GCR at revision 2.1.
BIOS · 1.86 MB · 24 Jan 2024BIOS rar—1.86 MB