Loud squealing noise in headphone/speaker followed by computer freezing Every so often when I move my MacBook Pro I get a loud squealing noise through the headphones/speakers and then it freezes.  After a forced reboot, everything is back to normal.

I looked in to the console to see if there could be anything related. Found a system report for a high memory water mark. In the system log, too, there is a bunch of abnormal code 126, and around the time the freeze up happens a few 255 and 110 codes. There are a lot of logs to go through and I have a screen recording of them all if that helps anyone.
Notice: Although it seems unlikely it is possible there is a fault with the machine that could escalate, so if you haven't already please make sure to take a backup of your important documents.


There are a few things you could try:


Perform a PRAM reset by following Apple's instructions: http://support.apple.com/kb/HT1379
Perform an SMC reset by following Apple's instructions: http://support.apple.com/kb/HT1543


Test for a period


Run Apple Hardware Test by following Apple's instructions, running the full/extended test: https://support.apple.com/en-gb/HT201257


Review the results for any obvious hardware faults


Take a backup and reinstall macOS, I can provide instructions here if you get that far, but let's see the results of the hardware fault and screenshots, you can add them to your original post as an edit.