black screen and high temperature (CPU: i7-8750H GPU: NVIDIA 1050TI RAM: 16gb. OS: Windows 10 Pro 64bits )

[peepoelp]

For three months the screen of my laptop has been turning off without blinking or any signal and the peripherals do not respond. Whether while gaming, watching Netflix, YouTube, working or just doing nothing. When the screen is turned off I can hear the fans spinning. I did a factory reset, clean the fans, and replace the thermal paste. This worked for about two weeks and again the screen started to turn off. While I am doing nothing the temperature of the processor varies between 45c-73c and when I open Google Chrome, MS office or any program it has a peak of 80c-90c. then try to undervolting the CPU and GPU. It worked for me I managed to reduce the temperature from 95c-88c to 65c-71c while gaming. The temperature while sitting at the desk without doing anything low to 32c-45c. however after four hours of use the screen turned off again.
If someone knows what can be or can guide me to a solution, I thank you in advance.
Temps when idle

ThrottleStop undervolt config

While runing cinebench

 

[Hemmingstamp]

Best post all your computer specs first so the good people at TPU can help you out
Make and model of your laptop would be a starter..

 

[joemama]

The black screen shouldn't be the result of high temperatures, there must be another root cause to it.

 

[Caring1]

You haven't undervolted, you have limited the boost of your CPU and the power limits.
Have you read any of the helpful threads here on undervolting with ThrottleStop?

ThrottleStop

Optimize and tweak your Intel processor

www.techpowerup.com