No audio at all

Hello, I've repaired my iPhone 4s display, than i wen't to bed and when i woke up i had no sounds at all. So i thought it could be dock connector mistake (since my charging was working only in few exact positions), so i replaced it immediately, but no change. When i plug-in headphones and press + - volume buttons it just says "Volume" instead of headphones, also i cannot hear anything in them, when i unplug them i still can't hear anything.

bump