Just fixed this model, the symptom is, at low resolution, the backlights will be on but I can noise and horizontal noise bar, when I set the resolution to its native resolution, it will act like 2-second to black, the blue power light will stay on.
The cause of the problem was due to two bad DC filter caps (100uF 16V) for the 3.3V and the 1.8V LDO on the logic board.
See pictures.
One cap show 80uF with 3 Ohms ESR, another one read 100uF with 3 Ohms ESR.
The cause of the problem was due to two bad DC filter caps (100uF 16V) for the 3.3V and the 1.8V LDO on the logic board.
See pictures.
One cap show 80uF with 3 Ohms ESR, another one read 100uF with 3 Ohms ESR.
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