No. The schematic is a circuit diagram. The BIOS is a separate binary file (usually 8MB or 16MB). You need both; the schematic helps you flash the BIOS correctly via the SPI header.
Possibly. The A515-51 uses the LA-B921P (similar but not identical). While some power rails may match, the pinouts for the EC and connectors differ. Do not assume compatibility.
Look for the BQ24780S. Pins to check:
If the laptop turns on but the screen remains black, the issue could be a blown fuse on the LCD backlight rail or a missing voltage on the RAM slot. The La-9412p schematic explicitly marks test points and voltage requirements for the integrated graphics and the LVDS/eDP connector. This allows you to distinguish between a software error and a blown capacitor shorting the rail.
The KB9012QF chip acts as the "brain" before the main processor wakes up. The LA-9412P schematic outlines the pinout for this chip, which is essential for verifying if the power button signal is actually reaching the system.
Always disconnect the battery and AC adapter before probing the board.
