Why does my laptop suddenly turn off?

pu1. I think it's because there's a lot of dust in the laptop and it's not cooling well. You can separate the laptop case and clean the dust inside. Especially for fans, it's easy to get dusty, but it's good to clean around this side

2017-12-15

OK

pu2. It seems that the heat in the cpu is generating a lot and it is going down. In this case, the cooler usually doesn't work well, but check if the fan is working well

2017-12-15

OK