Hi everyone.
First, let me preface by saying that I do not have much experience with diagnosing damages in motherboards other than visual inspection and checking simple short to ground faults.
But I do learn quickly, and really want to learn how to properly diagnose motherboard faults. If someone could have the patience to go over this board with me, it would be greatly appreciated.
A customer came into my shop with a A2179 MacBook with an 820-01958-A logic board. The reason for bringing the laptop in is that the laptop stopped turning on.
First thing I did was check the charger, the charger is in good working condition. The second step was opening up the laptop, disconnecting the keyboard/trackpad and battery and connected the charger to see if that way it might turn on to discard problems with battery and/or keyboard/trackpad.
The system led (D6959) turns on white when the charger is connected. The laptop is otherwise unresponsive, touch ID button won't turn it on, connecting charger won't turn it on, opening the lid won't turn it on either.
Visually inspecting, I did not find any component with obvious signs of damage. (no cracks, no discoloration, no burn marks, no signs of extreme heat.)
This leaves me with inspecting the board with my multimeter as the next step, but I don't know where to begin. (I have found the boardview and schematics pdf here on badcaps for this logic board)
Sincerely,
Rick.
First, let me preface by saying that I do not have much experience with diagnosing damages in motherboards other than visual inspection and checking simple short to ground faults.
But I do learn quickly, and really want to learn how to properly diagnose motherboard faults. If someone could have the patience to go over this board with me, it would be greatly appreciated.
A customer came into my shop with a A2179 MacBook with an 820-01958-A logic board. The reason for bringing the laptop in is that the laptop stopped turning on.
First thing I did was check the charger, the charger is in good working condition. The second step was opening up the laptop, disconnecting the keyboard/trackpad and battery and connected the charger to see if that way it might turn on to discard problems with battery and/or keyboard/trackpad.
The system led (D6959) turns on white when the charger is connected. The laptop is otherwise unresponsive, touch ID button won't turn it on, connecting charger won't turn it on, opening the lid won't turn it on either.
Visually inspecting, I did not find any component with obvious signs of damage. (no cracks, no discoloration, no burn marks, no signs of extreme heat.)
This leaves me with inspecting the board with my multimeter as the next step, but I don't know where to begin. (I have found the boardview and schematics pdf here on badcaps for this logic board)
Sincerely,
Rick.
