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.
The is a motherboard manufactured by Compal, commonly found in HP 15-ba series laptops and HP 255 G5 models. Repairing this board requires an understanding of its power sequence, common component failures, and the specific circuit architecture defined in its technical schematic. Technical Overview
Generally indicates a short on one of the main power rails ( 1.35V1.35 cap V VCOREcap V cap C cap O cap R cap E 4. Troubleshooting Steps Using the Schematic To perform schematic work on the BDL51 LA-D711P Go to product viewer dialog for this item. , follow this sequence: Check +19Vpositive 19 cap V Input: Measure at the DC jack and after the input MOSFETs. Check +3VALWpositive 3 cap V cap A cap L cap W +5VALWpositive 5 cap V cap A cap L cap W : Check the outputs of the standby power IC. Check BIOS Communication: Verify 3.3V3.3 cap V is present on Pin 8 of the BIOS chip. bdl51 lad711p rev 30 schematic work
The motherboard you're working with is officially designated , a common platform found in several HP laptop models, including the HP 255 G5, HP 15-BA, and HP 15-AY series . Developed by Compal, a major ODM for HP, these boards are often identified by a unique combination of codes. "BDL51" is the internal project name, while "LA-D711P" is the PCB part number, and "REV 3.0" indicates the specific design revision.
Memory power (DDR4 or DDR3L depending on sub-model). VCORE: CPU power (should only appear last in the sequence). Repair Resources Once the power button is pressed, the EC
BDL51 LA-D711P Rev: 3.0 is a motherboard commonly found in the HP 15-ba series
Remember: is repairable. The majority of failures are predictable: startup capacitors, PFC diodes, and cracked solder joints. By following the workflow outlined here, you can diagnose with precision, replace components with confidence, and avoid blindly replacing the entire board. Repairing this board requires an understanding of its
HP 15-ba009dx, HP 255 G5, HP 15-af series. Processor: Integrated AMD (UMA). 2. Key Schematic Areas and Component Identification
Many forums require registration to view attachments or download files. When searching, combine keywords like the motherboard number (), project name ( BDL51 ), and revision ( REV 3.0 or REV 1.0 ). Be cautious of sites that ask for payment or completing surveys; many free resources are available with a bit of persistence. The table below summarizes the key information to aid in your search.
AMD Carrizo-L or Stoney Ridge Accelerated Processing Units (APUs).