How to transfer an image from the phone to the computer if the screen goes blank and something cannot be confirmed on the phone?

Question

samsung galaxy

Initially, the problem arose, the description and the question itself are just below:
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How to enter the phone if the display failed?
How to log into the phone if the display failed?
Suddenly, the display of the Samsung A50 turned green, and when it started to reboot a little later, it went in stripes and went out.
Sat amoled, apparently. Could die decoder.
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How to connect a second screen to the phone in order to demolish everything to the factory settings and give it to the service?
I was able to connect to the phone through my google account, but now somehow I need to access the phone's display and see what's there. Make sure it's all there.
Thank you in advance for your response!