Re: A1707 20Vs works, faulty left charge port
See attached. These are a few of the diodes on J3300.
The idea is to check each and every pin that has a diode on its contact and confirm that it is not shorted due to some massive transient. Diodes are sacrificial devices, if they are pushed beyond their rating, unlike the Hulk, they will short out.
Suggestion is:
1) remove the paddle board and connect only your type C meter. Power cycle the adapter -> the meter should light up since there is no load. This is at least possible with the ones we own here.
2) Repeat but add the same dual type C paddle board -> power cycle the adapter. Does it still power up for a few seconds before going dark? If not, the paddle board is a possible defect.
3) If you find that upon seating onto J3300, the meter goes dark, then the connector @ J3300 should be inspected for liquid damage and also in diode mode. Be sure that no pin with a diode is showing close to 0 reading = short in diode mode. Do compare against the side that is working well for the same board.
The above is how I would review this case. Something is causing that meter to go dark so proceed one piece of the puzzle at a time.
See attached. These are a few of the diodes on J3300.
The idea is to check each and every pin that has a diode on its contact and confirm that it is not shorted due to some massive transient. Diodes are sacrificial devices, if they are pushed beyond their rating, unlike the Hulk, they will short out.
Suggestion is:
1) remove the paddle board and connect only your type C meter. Power cycle the adapter -> the meter should light up since there is no load. This is at least possible with the ones we own here.
2) Repeat but add the same dual type C paddle board -> power cycle the adapter. Does it still power up for a few seconds before going dark? If not, the paddle board is a possible defect.
3) If you find that upon seating onto J3300, the meter goes dark, then the connector @ J3300 should be inspected for liquid damage and also in diode mode. Be sure that no pin with a diode is showing close to 0 reading = short in diode mode. Do compare against the side that is working well for the same board.
The above is how I would review this case. Something is causing that meter to go dark so proceed one piece of the puzzle at a time.
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