Chosen Solution
Hi! When I run the Apple Hardware Test on Macbook Pro 13" 2.5 GHz 2012. It shows me error 4SNS/1/40000000: ICOR - 21.925. Could you explain me what wrong with my mac? Thanks for your answer. I understand that my logic board has problem with system sensor. But, when I try to run AHT test again it shows me the same error but the last number is different all time. What is this number and why is this number different each time?
Here’s a good reference: How to invoke and interpret the Apple hardware tests. I had to use my ASD lookup to get ICOR error. So if we take your error: 4SNS/1/40000000: ICOR - 21.925 and break it down this is what we have: 4SNS System sensor ICOR CPU 1.05 V Rail Average Current - Mac Mini (Early 2009)
The “21.925” number at the end will change each time because that is the temperature it recorded during the diagnostics test.
