


- #Mac verify and test usb for hardware error how to
- #Mac verify and test usb for hardware error code
- #Mac verify and test usb for hardware error professional
- #Mac verify and test usb for hardware error mac
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.
#Mac verify and test usb for hardware error code
In comparing the code "4SNS/1/40000000: TH00-9.5.9.2" to the lists, we have determined that the "4SNS" error identified a sensor being faulty and that the "T" error code indicates it to be a temperature sensor in the Hard Disk as the "H" error code aligns to that component. N: North Bridge (Logic Board Controller).m: Miscellaneous (Peripherals such as a Battery Charger).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. I denotes it is an electrical sensor, V indicates a voltage sensor and lastly T signifies it to be a temperature sensor. 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. This time, let's use the example code "4SNS/1/40000000: TH00-9.5.9.2" to explain how the sensor codes work.
#Mac verify and test usb for hardware error mac
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. Most error codes are pretty straightforward to decode except "4SNS" which indicates a system sensor error. 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.Ĭomparing 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. The first four characters in the code identify the component that has reported a failure. This information should allow you to best determine the course of corrective action necessary to repair a device.Īs an example, we'll use the code "4MOT/4/40000002:HHD-0" to explain how the code works. With that said, I present the breakdown of AHT codes and what they mean as a way to better interpret the issues affecting your Apple computers.


Risk of further damage to your computer - and even your health - is a very real threat when not working using the proper tools and safety precautions. Especially when it comes to non-end-user-serviceable parts, such as Logic Boards, Power Supply, or LCD panels, just to name a few.
#Mac verify and test usb for hardware error professional
While having an authorized professional inform you of the particular issue(s) affecting your Mac computer and providing solutions to correct them are not a bad thing at all, depending on your skill level as a repair technician and availability of replacement parts, many hardware issues affecting Apple's computers could be repaired within minutes or hours as opposed to days or weeks, if the device must be shipped out to a repair depot.Ī word of caution though- while knowing the cause of the problem is all well and good, it is a far leap to actually possessing the skills necessary to undertake the repair yourself. This requires providing the information directly to Apple or an authorized service center for a more lay explanation. Though when errors are indeed found, the amalgamation of letters and numbers defy all logic, and worst of all, leave no room for even the slightest hint as to what is wrong with the system. Often times, no errors are found- which is a good thing- meaning the hardware checks out as operating properly. AHT, while light-weight, is ghastly at relaying important troubleshooting information the system has detected during a scan.
