Hp LA-D707p Dead No Power || Hp laptop dead no power || Hp Laptop Dead Solution
Автор: RATHORE IT SERVICES
Загружено: 2026-03-17
Просмотров: 12
Описание:
Hp LA-D707p Dead No Power || Hp laptop dead no power || Hp Laptop Dead Solution
This video (0:00 - 6:19) covers the repair process for an HP LA-D707P laptop that has no power (dead). The technician diagnoses the issue and provides a solution involving the step-down IC and the I/O chip.
Diagnosis and Repair Highlights:
Initial Testing (0:00 - 1:45): The laptop shows no power, though a white LED lights up when the charger is connected. Initial checks show 19V entering the board, but the 3V/5V rails are missing (1:19).
Checking the Step-Down IC (1:46 - 3:45): Voltage checks on the step-down IC (PU2) reveal that the EC_ON signal is missing from the I/O chip (3:20). This signal is required to start the switching process for the 3V/5V rails.
Solution (3:46 - 4:40): The technician resolves the issue by jumping a 3.3V line to the EC_ON pin, ensuring the timing matches the requirement for the IC to trigger properly.
Testing and Verification (5:07 - 5:35): After the repair, the motherboard draws power (560+ amperage) and the processor becomes warm, indicating the board is working again.
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