|For this kind of a case, one need to know the kind of PC it is. Either desktop or laptop. More so, one need to check for it warranty either online or from receipt date as at the point of purchase. If any of the warranty is applied there is no need to work on the PC.|
In case it is out of warranty do the following:
Check the CPU fan while the system is in operation, if stopped check it connecting cable whether it is well connected and firm and check for any physical damage on the CPU fan cable. If okay then check whether the thermal compound is not dried in case is dried replace it. Then test for operation.
Check the laptop CPU fan connecting cable if well connected and not damaged in case any issue get it resolve, if not okay check the PC thermal compound if dried replace it, if not okay check the thermal heat sink pipe for dirt, in case there is any dirt blow it way for the thermal heat sink to be able to blow heat away from the case.