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Unresponsive Trackpad & Keyboard + Loud Fan (4 Error codes?)

Hi everyone,

My MacBook has been working marvellously since 2015. However during the past few weeks my trackpad and keyboard have become totally unresponsive. The force touch still clicks (vibrates) yet no response whatsoever. I’ve now plugged in a USB mouse and keyboard and that’s how I use it daily.

The fans sometimes are really loud also so I’ve downloaded TG Pro to manually override this.

Apple hardware diagnostic test Results:

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  • There may be an issue with the trackpad. NDR001
  • There may be an issue with the power management system. Reference code: PPN001
  • Additional reference codes: PFM006, NDC001

What I’ve done so far:

  • SMC Reset + Pram Reset. This fixed the fan issue temporarily. (Several days later had to manually override the fans as it went out of control again).
  • Replaced Trackpad Cable to no avail.
  • went on safe mode and issue still persists. Apple store suggest I replace the entire logic board but I’ve opened up to look and see no evidence of corrosion.

TGPro indicate these temperature sensors may not be working properly: Power supply, LCD, ….. Not sure what this means.

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Any help would greatly be appreciated.

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Looking at this resource for more information on those additional codes, my best guess is that either the trackpad itself has failed and is regularly corrupting the SMC, or one of the components or communication channels on the logic board is damaged and causing SMC issues. To resolve you may need to replace the logic board or the trackpad, though I would be more suspicious of the logic board considering the TGPro results.

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I’ve checked the guide. NDC001 indicates problems with camera however my camera is working perfectly.

Also my error code PPN001 is not stated in the guide.

I would consider a logic board repair but only as a last resort since it’s costly.

Thx for your comment.


Likely Liban H has a bad trackpad MacBook Pro 15" Retina (Mid 2015) Trackpad I often find a liquid spill gets to the circuitry on the back side.

Reference: Apple Diagnostics reference codes


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Liban H wird auf ewig dankbar sein.
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