I've been struggling the last couple of weeks with this issue. Approximately two months ago my my son smashed my laptop screen so I've replaced it with a external monitor ( BenQ ZOWIE XL2411K 144hz)
But since I've been using the external screen I've had nothing but issues. Everytime I try to play CSGO within 5-10 minutes the laptop enters hibernation mode due to overheating.
So far I've tried run the screen at 144hz, 120hz and lately at 100hz but still no luck. I've also cleaned the fans (which were covered in dust) but again, no difference..
Can someone help me?