Chosen Solution
I have a 27” Thunderbolt display (second hand). When connected to my Mac Mini (new), the display screen went fuzzy, dark, so used the other port and it worked. After a while, the display started to black in and out, and notice the display was very hot, bottom left hand side of display. I’m not sure but I do not hear the fan working. I am currently working on Mac Mini and when it feels hot will put it in sleep mode till it cools down after an hour. Can anybody help me work out what is going on as I think it it is just a fan and temperature sensor, but I would appreciate any help from the “hit it with a hammer “ brigade. FYI - I’m a newbie to Apple Mac’s p.s The definition of an Engineer, is a man with a hammer in his hand. LOL
The power supply is in the left hand corner. See step #7 of this guide: Apple Thunderbolt Display Teardown I would open it up and use compressed air to blow the dirt out. Then use an IR gun on the power supply to see if it is over heating or any component is overheating.
The thunderbolt cable is getting too hot due to outlet heat Mac Mini
