Mac notebooks: Apple Hardware Test may report SNS alert when power adapter is not connected

When you test your Mac notebook with Apple Hardware Test (AHT) diagnostics, you may encounter one of the following messages if the power adapter is disconnected.

This article has been archived and is no longer updated by Apple.
  • 4 SNS/1/40000001: IDOR
  • 4 SNS/1/40000001: VPOR

Connect the power adapter before you run Apple Hardware Test. If the message appears again with the power adapter connected to the computer, schedule an appointment at an Apple Retail Store or contact an Apple Service Provider.

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