Toshiba · laptop motherboard

Toshiba Satellite C55-B LA-B303P

SchematicBIOS
Board code
LA-B303P
Platform
ZBWAA
Made by
Compal
Revisions
Rev 1.0
Files
7
Updated

Toshiba Satellite C55-B LA-B303P is a laptop motherboard designed by Compal and used in the Toshiba Satellite C55-B, Toshiba Satellite C55, Toshiba C55T-LA-B303P and Toshiba Satellite C55-B148.

The catalog has 2 schematics and 5 BIOS files for it, posted between 2017 and 2026 across 4 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 files are PDFs; 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.

Also listed under platform ZBWAA.

Compatible models

Files for Toshiba Satellite C55-B LA-B303P

Schematics 2 All schematics →

BIOS and firmware 5 All bios and firmware →

Frequently asked questions

Which laptops use the LA-B303P motherboard?
File names in the catalog tie LA-B303P to the Toshiba Satellite C55-B, Toshiba Satellite C55, Toshiba C55T-LA-B303P and Toshiba Satellite C55-B148. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of LA-B303P 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-B303P 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