Bdl51 Lad711p Rev 30 Schematic Work | 2027 |

BDL51 LA-D711P Rev: 3.0 is a motherboard commonly found in the HP 15-ba series

Power Rail Hierarchy:

Schematics for the LA-D711P detail the flow of voltage from the DC-in jack (usually 19.5V) down to lower voltages required by various sub-systems. 2. Key Power Stages in the LA-D711P bdl51 lad711p rev 30 schematic work

cross-reference

If no direct hit, look for a : The same schematic topology appears as LAD710P (previous rev) and LAD712P (later rev). Compare component designators. BDL51 LA-D711P Rev: 3

• UART, I2C, SPI traces and pull-ups/pull-downs
• Ethernet/USB or serial connectors as applicable
• Isolation components (transformer, optocoupler) if required

• Microcontroller (likely 8/32-bit) with crystal/oscillator, decoupling, BOOT/RESET pins
• Programming header (SWD/JTAG/ISP)
• Level translators or buffer gates to external interfaces

Primary Input (VIN)

To troubleshoot "no power" or "dead" symptoms on this board, follow this diagnostic path based on common repair logs: Microcontroller (likely 8/32-bit) with crystal/oscillator

EC_ON:

Signal from the KB9022Q multi-controller to enable main rails. +3VALW / +5VALW: "Always-on" standby voltages.

troubleshooting

Are you currently a specific power rail or looking for the BIOS dump for this board?

19.5V

Verify at the DC-in jack and after the first two mosfets (Protection Circuit).