La-9413p Rev 1.0 Schematic • Recommended

LA-9413P Rev 1.0 is a motherboard schematic manufactured by Compal Electronics

5. No display, but fan spins

• Check +LCDVDD (3.3V) and +VIN_PCH_LVDS.
• Measure backlight enable (EN_BL) & PWM (BKL_PWM).
• Reprogram BIOS (U9) – very common.

Common Fault Tracing via Schematic

Technicians often reference the LA-9413P schematic for two common failure modes: la-9413p rev 1.0 schematic

Since these are proprietary documents, they aren't usually hosted on official Dell sites. You can typically find them on: BadCaps.net (Free community forums) VinaFix or LaptopBlue (Technician databases) Sinaish (Schematic archives) LA-9413P Rev 1

Step 1: DC-In (PWR_SRC)

BIOS Issues: This board uses two SPI Flash chips (UH2 and UH6). If power rails are present but there is no display, a BIOS re-flash is often required. Check +LCDVDD (3