(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== Any shorted subrail on A1990 machines can cause the machine to hang on POST.thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it! ==Symptoms== *MacBook hanging on POST ==Solution== *Thermal imaging can reveal abnormal heat caused by a shorted component. *This condition is most frequently caused b...") |
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{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=MacBook Pro A1989 | ||
|Affects parts= | |Affects parts=Motherboard | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station, thermal camera | ||
|Type= | |Type=Soldering, Micro-Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
{{stub}} | |||
==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!]] | 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!]] | ||
Revision as of 14:50, 14 October 2023
| MacBook Pro A1989 "Braindead" repair | |
|---|---|
| Device | MacBook Pro A1989 |
| 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.