Fans won’t spin enough to cool the APU
I recently opened up a friends PlayStation 4 to replace the Thermal Paste as I thought that was the problem to why it’s overheating, the old compound was so crusty. Put everything back together, it can start up but after 5 minutes and it will force shut down due to overheating ( and that’s just on the XMB ) and the fan control has stayed the same the entire boot up. I cleaned out the fan weeks ago, but still no luck.
I think it might be the fan which is causing the problem, the PS4 was sometimes left on 24/7 in sleep mode, and to my thought it wore out the fan. But then I realised there is a Thermal sensor, and another thought said it might be that, but I have no clue where it is located and I don’t know if I have touched it or if it’s damaged.
I am lost, I am a beginner and I don’t really know much about PS4’s so I got no clue what I’m doing.