W
The same thing happened to mine, you might have to have it repaired.
Something like that?centre part of my screen a black line appears
Did you found a solution how to fix it (forever)?Exactly like that.
Unfortunately I didn't.. I reported the issue to the person I bought it from, so they just gave me a refund after I sent it back.Did you found a solution how to fix it (forever)?
It seems a bit like a software (or controller) bug for me, cause it did not occure on boot screen (and appearing, disappearing, getting bigger or smaller randomly - but only when display is off.)