Mac mini 2012 apple hardware test

Another way to improve Mac performance
Contents:
  1. The Apple Hardware Test
  2. Use the Apple Hardware Test (AHT) to Find Problems
  3. Mac Not Booting to Apple Hardware Test (AHT)? Try this.

The Apple Hardware Test

While a cursory glance would point to an issue affecting "HDD-0," this assumption would be incorrect if you glance at the list below of known component codes. Comparing the "4MOT" error code against the list above, it reveals that the failure actually stems from a fan motor, likely the cooling fan responsible for keeping HDD-0 running cool and efficiently.


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Most error codes are pretty straightforward to decode except "4SNS" which indicates a system sensor error. These are difficult to place because there are many sensors in use on a given Mac so a secondary table is used to conclude which sensor is faulty.

When a sensor error is detected, the code "4SNS" is used to identify that it is a sensor, however the second half of the error code will provide the necessary information to determine what type of sensor it is. I denotes it is an electrical sensor, V indicates a voltage sensor and lastly T signifies it to be a temperature sensor.

The location of the component that the sensor looks after can be gleaned by reviewing the list below for the matching code, paying special attention to case-sensitivity. With this information at your fingertips, making sense of the jumble of letters and numbers helps to correctly inform the repairing technician of where the problem lies and how to go about repairing it. Luckily for us, Apple has made Apple Diagnostics much more layman friendly as the error codes are followed with a plaintext explanation of what was found to further aid in the repair process.

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How to use Apple Hardware Test

Or Would you like to share an AHT experience? Let us know in the comments section please. He brings 19 years of experience and multiple certifications from seve Editor's Picks. Transgender employees in tech: Why this "progressive" industry has more work to do.

Use the Apple Hardware Test (AHT) to Find Problems

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    Mac Not Booting to Apple Hardware Test (AHT)? Try this.

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