Randomly Black Screen for a few Seconds

Hey Guys,

I'm thinking of buying an used iPhone 14 Pro for 300€, but the Owner says it got a small Problem. The Screen randomly goes black for a few Seconds and Turns Back on, while the Phone IT self ist working very good.

Now my question: is it possible to repair the thing so it works normaly? (And thr Owner got the battery and backcover replaced a while ago)

Hendrik