my MacBook Pro screen is black in certain positions

It sounds like you have a defective Display Assembly which will need to be repaired.

See if your laptop qualifies for this free Apple backlight repair program:

https://support.apple.com/13-inch-macbook-pro-display-backlight-service

FYI, here is a current list of the publicly acknowledged free repair programs for various Apple products (some have multiple programs):

https://support.apple.com/service-programs

jastip Said:

“my MacBook Pro screen is black in certain positions”

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Avoid Privacy Filters:

A Privacy Filter would most certainly cause this. So, take it off. Moreover, avoid using one, as it would overheat your screen, and may be considered intentional damage. As a result, that would most certainly cancel AppleCare+ Coverage, if you have it.