Help!

Drop it again to see if it fixes it :P

Check the settings to see if 당신 accidentally did something to the display on the screen.

또는

당신 simply cracked the screen, 또는 entirely broke it.

So

I suggest taking it to a repair shop.

i can't quite see what it is, but the video card might be damaged.
당신 should take it to a repair shop.

no idea
sorry

Soak it in water

I'd say have it repaired 또는 not get a replaced one.

That reminds me of my old phone. I dropped it and the screen broke. I tried powering it off and then back on but it was still like that. My 조언 is get it repaired (even though the Verizon people said they couldn't...) ir get a new one.