MacBook Air A2179 Not turning on, pulling 0 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 15:17, 29 October 2023
| MacBook Air A2179 Not turning on, pulling 0 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 powering up, SLPS2R and AWAKE voltages/signals all 0, PP3V3_G3H 0.9V, PP3V3_G3H_RTC 3.3V.
Symptoms
- MacBook not powering up.
- SLPS2R and AWAKE voltages/signals all 0.
- PP3V3_G3H 0.9V, PP3V3_G3H_RTC 3.3V.
Solution
PMU_VDD_HI signal is not reaching U7800 (figure 1) due to corroded R8050 (figure 2).