BIOS - Dell 3721 LA-9105P Rev;2.3

Mar 13, 2025

Dell 3721 LA-9105P Rev;2.3
biosbin.zip

About this board

Dell 3721 — motherboard LA-9105P.

The board was manufactured by Compal for Dell. Compal board numbers start with LA- and end in P, so you can confirm it on the PCB silkscreen. This listing is for revision 2.3; another revision of the same board can need a different file.

Files usually needed for this board

BIOS (full SPI chip dump, .bin)
EC / KBC firmware, if the board uses a separate EC chip
Schematic (PDF)
Boardview (.brd / .bdv / .cad)

Common cases: dead board after an interrupted BIOS update, ME region errors, missing serial number or UUID after a board swap, or a password lock.

Back up the original dump first — it contains machine-specific data (serial, UUID, MAC, ME), and you will want it if anything goes wrong.

If you have a working file for this board, please share it below. More files: search LA-9105P in File Finder.

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BIOS Dell 3721 LA-9105P Rev;2.3

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