MacBook Pro A1990 Question mark folder repair

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Revision as of 16:36, 11 October 2023 by ASRepairs (talk | contribs) (Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== Question mark folder, no external boot possible & Recovery does not work on A1990 MacBook thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it! ==Symptoms== *Question mark folder *No external boot possible *Recovery does not work ==Solution== - Check U9080, U9580, U9000 & U9500 and SSD power ra...")
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MacBook Pro A1990 Question mark folder repair
Device
Affects part(s)
Needs equipment
Difficulty
Type


Problem description

Question mark folder, no external boot possible & Recovery does not work on A1990 MacBook

Example image (Figure 1) -- No image yet. Help expand this page by uploading it!

Symptoms

  • Question mark folder
  • No external boot possible
  • Recovery does not work

Solution

- Check U9080, U9580, U9000 & U9500 and SSD power rails PP2V5_NAND_SSD0, PP2V5_NAND_SSD1, PP0V9_SSD0, PP0V9_SSD1, PP1V8_SSD0, PP1V8_SSD1

- Flash T2, Update Intel Mac T2 BridgeOS Firmware, Boot Mac into DFU Mode Then Reinstall MacOS Via Recovery CMD R

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