The LA-C921P is a motherboard designed by Compal, a major manufacturer of laptop internals. This board is engineered to support Intel processors and features integrated or discrete graphics architectures depending on the specific laptop configuration.
: This article aims to provide general information and guidance. The availability and accuracy of the ASL50 LAC921P Rev 10 schematic cannot be guaranteed, and users should exercise caution when working with electronic circuits.
Power enters the board via the DC-in jack at . It passes through the reverse-polarity protection diodes and the first two isolation MOSFETs (usually controlled by the charging IC, such as the BQ series). Once these gates open, the primary system power rail, B+ (+19V) , becomes active across the entire board. Step 2: Always-On Power Supplies (+3VALW / +5VALW) asl50 lac921p rev 10 schematic free
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Attach a of the board label (helps the support rep locate the exact part). The LA-C921P is a motherboard designed by Compal,
: If the board doesn't turn on despite having 19V, the schematic is used to verify the input/output voltages on the SIO (Super I/O) chip, which manages the start-up logic.
What have you taken on the main coils so far? The availability and accuracy of the ASL50 LAC921P
To help tailor this guide further, what is the motherboard displaying?
Date: March 23, 2026