Bdl51 Lad711p Rev 30 Schematic Work
This should give you a solid foundation to start your schematic work. Best of luck with your repair!
A SPI flash memory chip containing the board firmware matching specific Build ID (BID) codes (e.g., BID 082F6, 081F5), which must correspond precisely to the APU microcode.
Symptom B: Laptop Turns On, Fan Spins at Max Speed, No Display
: Discrete configurations of this motherboard host an AMD Radeon R5 M430 (using chip code 216-0867071) paired with dedicated VRAM. bdl51 lad711p rev 30 schematic work
Turn off all power. Use a digital multimeter in diode or resistance mode to measure the resistance to ground on all large output inductors (coils). Low resistance (less than
For "no display" faults, technicians often check the 0.8V Core voltage and 1.2V Graphic Core voltage. If these are missing, the processor isn't "waking up" to generate a video signal. 3. Common Components and Symbols
Use a schematic from a similar Compal board that uses the same chip. This should give you a solid foundation to
Typical checks:
If voltages are missing, check the Enable ( EN ) pins on the controller IC PU2 . If the IC has power and enablement but no output, check the low-side and high-side switching MOSFETs connected to those inductors. Step 5: Analyzing the Power Button Signal and EC
Typically an 8MB (64Mbit) SPI Flash chip holding the system firmware. 2. Main Power Rails and Sequencing Symptom B: Laptop Turns On, Fan Spins at
Often available in .cad or .brd formats, which help you locate components physically on the PCB.
The BDL51 LA-D711P Rev 30 is a widely utilized Compal motherboard found in several generations of Hewlett-Packard (HP) laptops, most notably the HP 15-AY and 15-BA series. When these laptops fail to power on, experience short circuits, or suffer from charging anomalies, having access to the schematic diagram is essential for component-level repair.
Given the difficulty of finding the schematic, my article will focus on:
