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MacBook Pro A1398, 820-3332A Logic Board TSOP Error

Hello,

I have a 2013 Macbook Pro 15. 10 seconds into the bootup the fans go full throttle, the MacBook is slow to boot, and once it does manage to boot the CPU is > 100% at all times.

  • Ran AHT, it reported – 4SNS/1/40000000 TsOP—124
  • Bought a new trackpad with cable, replaced. No change, same issue.
  • Removed the logic board, cleaned everything and reinstalled. No change, same issue.

Any suggestions / help would be deeply appreciated. Thanks.

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Check the logic board thoroughly for damage; blown components or damaged sensor circuits can cause this issue. Test it will just the charging port, fans, SSD and trackpad connected; if the fans still go full speed it will be logic board related.

If it is logic board related, I would suggest taking it to a repair centre to check out; a decent repairer will know areas to check and will determine what is causing the fault.

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