For "No Display" issues, ensure the CPU core voltage ( ) and graphic core voltage ( ) are stable.
These are generated by a step-down IC (e.g., TPS51225C ). If these rails are missing, check the IC for overheating or shorts to ground on the output coils. bdl51 lad711p rev 30 schematic work
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 For "No Display" issues, ensure the CPU core
Verify that 19V is present at the input and passing through the first and second MOSFETs (often labeled PQ4 or similar). For "No Display" issues