Lenovo · laptop motherboard

Lenovo ThinkPad E420S LA-6921P

SchematicBIOS
Board code
LA-6921P
Made by
Compal
Revisions
Rev 1.0
Files
2
Updated

Lenovo ThinkPad E420S LA-6921P is a laptop motherboard designed by Compal and used in the Lenovo ThinkPad E420S.

The catalog has 1 schematic and 1 BIOS file for it, posted in 2021 across 2 Telegram channels. Each download button opens the original Telegram post.

The files are marked Rev 1.0; other revisions of the same board can differ in parts and layout.

The schematic is a PDF; the first pages usually hold the block diagram and the power sequence. New to schematics? Start with How to Use a Schematic and a Boardview Together.

BIOS notes: some archives also hold EC/KBC firmware. Read and save the original chip contents before you write anything to it — Keeping the Windows Product Key (MSDM) When Reflashing a BIOS.

Compatible models

  • Lenovo ThinkPad E420S

Files for Lenovo ThinkPad E420S LA-6921P

Schematics 1 All schematics →

BIOS and firmware 1 All bios and firmware →

  • Bios_IBM_Thinkpad_E420s_LA_6921P_Rev_1_0_UMA_Compal_BIOS_&_EC.rar 2.3 MBRev 1.0
    Download from Telegram

Frequently asked questions

Which laptops use the LA-6921P motherboard?
File names in the catalog tie LA-6921P to the Lenovo ThinkPad E420S. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of LA-6921P do I have?
Files for this board mention Rev 1.0. The revision is printed on the PCB silkscreen, usually next to the board code. Pick files with the same revision when you can; if yours is not listed, the closest revision is usually fine for the schematic but check part positions in the boardview carefully.
What should I check before flashing the LA-6921P BIOS?
Read the original chip with a programmer and save two copies before writing anything. Some archives include EC/KBC firmware, which may need to be written to a separate chip. A dump from another board carries that board's serial number and MAC address, so restore yours from the backup.

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Files are hosted on Telegram by third parties; ExcitingSpas.com only links to public posts. Check that a file matches your board before using it. Disclaimer · Report a file