I have some 4 case fans and wanted to test witch one of them is making noise, so in order to rule out the cpu fan i turnded it off(pluges out the motherboard power conector). After that i turned on the pc and got a bios warning that there is a cooler error for the cpu, after some 5 sec i turned off the computer. The cpu is ryzen 5 2600, and the cpu ran some 15 - 25 sec without a cooler that was pluged out, so the question is might have i done some dmg to the cpu by running it like that. Now the cpu is running @ 32-35 celsius. Thanks