MacBook Pro A1990 Not turning on, short on PPBUS G3H repair and MacBook Pro A1990 "Braindead" repair: Difference between pages
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==Problem description== | ==Problem description== | ||
Any shorted subrail on A1990 machines can cause the machine to hang on POST. | |||
[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]] | |||
==Symptoms== | ==Symptoms== | ||
*MacBook | *MacBook hanging on POST | ||
==Solution== | ==Solution== | ||
* Thermal imaging can reveal abnormal heat caused by a shorted component. | |||
* This condition is most frequently caused by a SSD subrail, such as the 2v7 SSD power line. | |||
Revision as of 16:18, 11 October 2023
| MacBook Pro A1990 "Braindead" repair | |
|---|---|
| Device | MacBook Pro A1990 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station, thermal camera |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering, Micro-Soldering"Micro-Soldering" is not in the list (Soldering, Teardown, Part replacement, Cleaning, Software, BGA, General) of allowed values for the "Repair Guide type" property. |
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Problem description
Any shorted subrail on A1990 machines can cause the machine to hang on POST.
Symptoms
- MacBook hanging on POST
Solution
- Thermal imaging can reveal abnormal heat caused by a shorted component.
- This condition is most frequently caused by a SSD subrail, such as the 2v7 SSD power line.