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iMac 2017 21.5 820-00597 Logic Board Will Not Power On
So, I got a 820-00597 logic board to replace the one in a 2017 21.5 4K iMac. It worked fine when I got it, powered up fine, was able to install MacOS on it. All done on the bench of course. I decided before putting it in the chassis to reapply the thermal paste for the CPU and GPU and look...- ideachief
- Thread
- Replies: 30
- Forum: Macbook Logic Board Repair Questions
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iMac 2017 21.5 820-00597 Logic Board No Power
Hello, I have an 820-00597 Logic Board from a 2017 21.5 inch iMac. I bought this board as-is so I don't know the history. There were two electrolytic caps that were broken off that I replaced (C6515 & C6526), other than that I can not find any damage. I'm bench powering this board, and my...- ideachief
- Thread
- Replies: 2
- Forum: Macbook Logic Board Repair Questions
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820-00163-A Thunderbolt Detection Issue
I have an 820-00163-A logic board that does not detect Thunderbolt devices or output video via DisplayPort on either port A or B, HDMI output works. ThunderBolt shows in System Profiler, no devices connected. Checked HPD voltage goes to ~3.2V when DisplayPort is connected but stays 0.0V when...- ideachief
- Thread
- Replies: 12
- Forum: Macbook Logic Board Repair Questions