MacBook Air A2179 Not turning on, pulling ~180-220 mA then going down to 20 mA at 5V repair: Difference between revisions
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|Affects parts=Motherboard | |Affects parts=Motherboard | ||
|Needs equipment=multimeter, soldering iron, soldering station | |Needs equipment=multimeter, soldering iron, soldering station | ||
|Type= | |Type=Soldering | ||
|Difficulty=3. Hard | |Difficulty=3. Hard | ||
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Latest revision as of 15:19, 29 October 2023
| MacBook Air A2179 Not turning on, pulling ~180-220 mA then going down to 20 mA at 5V repair | |
|---|---|
| Device | MacBook Air A2179 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
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Problem description
MacBook not turning on, 180-220 mA usage before going down to 20 milliamps, P5VG3S_EN missing. All rails below PP5V_G3S are present.
Symptoms
- MacBook not powering up.
- Drawing 180-220 mA then going down to 20 mA at 5V as measured by a USBC meter.
- P5VG3S_EN missing.
- All rails below PP5V_G3S are present.
Solution
The PMIC is dead, U7800 (Figure 1). Replace it.