More actions
| MacBook Pro A1708 Kills USBC devices repair | |
|---|---|
| Device | MacBook Pro A1708 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
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Problem description
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Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.
Symptoms
- Kills USB-C devices
Solution
Make sure that 20 V is only present on C3101 OR C3201 (PP20V_USBC_XA_VBUS OR PP20V_USBC_XB_VBUS). If A is making 20 V on B, or vice versa, likely need to replace the MOSFETs Q3100 and/or Q3200, since they're letting 20 V through (backwards!) when they're not supposed to.