I have a black screen. The phone was accidently dropped for only 2 seconds into a half-cup of water last night. To even have half a chance of saving it, it should be turned off and put in rice or perhaps silica. I thought the phone was off (hard to tell when the screen is BLACK). Put it in a zip lock bag full of silica gel paks. Pulled it out a few minutes ago and it was horribly hot. SO the power / home button thing is useless, obviously. How can you tell if it's powered off or if it's not?
Again, I don't WANT it to reset. I want it off. All responses I've seen are trying to reset and turn the phone back on. I think the OP (and myself) want to be able to turn it off.
It's probably ruined now anyway, since it never powered off. :-(