Help Help everything i press in iphone 4 black screen comes

[hotchair11]

please i need help my iphone have a problem everything i press its close by self when i press the yahoo or msn or any other games everything i press its comes black screen so when i press the yahoo in iphone 4 its come black screen please i need help

 

[tintbob]

Try turning it off, leave it a minute and turn back on

 

[hotchair11]

hello again i did try turn it off and leave it for a few minutes and when i turn it on still the same problem everything i press its comes black screen and close by self please help im really worried thanks