Bdl51 Lad711p Rev 30 Schematic Work ^new^ (720p • 4K)

Check the PM_SLP_S3# and PM_SLP_S5# signals coming out of the Southbridge/CPU to the EC. If these sleep signals do not change states, the CPU is missing a prerequisite clock, reset signal, or the BIOS chip requires reprogramming. Conclusion

To fix this board, you must know how power moves through it. The board needs different voltages to start up. If one step fails, the laptop stays dead.

motherboard is a legendary puzzle found inside many HP 15-ba series laptops. This is a story of a typical "dead" repair session. The Silent Patient

For "No Display" issues, ensure the CPU core voltage ( ) and graphic core voltage ( ) are stable. bdl51 lad711p rev 30 schematic work

To help refine your diagnostic process or firmware matching, please let me know:

If the laptop powers on (LEDs light up) but produces no image, check these areas:

laptops (such as the HP 15-ba009dx and 15-ba505ur). Repairing this board often involves addressing common power-related faults or BIOS corruption. Common Repair Scenarios "Dead" Board Repair Check the PM_SLP_S3# and PM_SLP_S5# signals coming out

The BDL51 LA-D711P Rev 30 board exhibits a few textbook failures that technicians face regularly. Symptom 1: Completely Dead Board (No Lights, No Charging)

The motherboard is typically paired with an AMD processor and DDR3L memory. While exact schematics for Rev 3.0 can be difficult to locate, they often share power rail designs with earlier revisions like Rev 1.0 or similar Compal "LA" series boards. Compal Model Number: BDL51 Board ID: LA-D711P Common Applications: HP 15-BA018WM, HP 255 G5 Common Faults and Diagnostics

This motherboard runs on an AMD processor. It controls everything from power delivery to screen graphics. The "Rev 3.0" means it is the third version of this specific design. The main brain chips on this board include: The board needs different voltages to start up

Once the power button is pressed, the EC releases the enable signals for secondary rails: RAM power rail. +1.0V_PCH: PCH core standby power.

Standardizes communication lanes between the CPU and memory.