Chosen Solution
After the kernel_task process started taking up too much CPU(like 500-1000%) and the system hangs, this happens randomly. I ran the AHT and the error shows up “4SNS/1/40000000: IO0R-1.550” Figured out this is a sensor issue (SNS) but didn’t find any resource mentioning the IO0R code. Does Anyone know what this code refers to? PS: My camera is also not working says “No video capture devices were found.” in System info Update (05/20/2016) I think I found the issue. I opened up my macbook for cleaning up (lot of dust). And disconnected the iSight camera cable. Now the Hardware test passes without any error.
It’s likely a problem with one of your current sensing resistors on the board. These can be replaced. Requires some micro soldering.
