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820-01827-A - Sudden death - 19V missing all USB-C port
- Thread starter samstown
- Start date
That means the short don't come from a secondary power supply.
Just in case, did you check L3500 and L9580 too?
Are placed on the other side of the board.
Just in case, did you check L3500 and L9580 too?
Are placed on the other side of the board.
OK, the short is now found; it is U9580.
Remove U9580 and check diode mode to ground at L9580/81 again.
If still short there, at least one NAND chip is fried.
The short from PPBUS_G3H to ground, will of course disapper.
Remove U9580 and check diode mode to ground at L9580/81 again.
If still short there, at least one NAND chip is fried.
The short from PPBUS_G3H to ground, will of course disapper.
NO.
In fact, you may need to replace all of them; from donor board, in same position.
In fact, you may need to replace all of them; from donor board, in same position.
Thank you for all your help. So I gave up and reassembled the Mac today. I did a little test before preparing the package. I see it's taking from 0.11 to 1.06 amp when I press the power button. So I tried to put it in DFU, that works. I tried "revive" but it failed with "the operation couldn't be completed (AMRetoreErrrorDomain error 6 - Failed to handle message type StatusMsg (Operation failed) ... Is it worth try with Apple GSX server ?