Help "automatic screen and button lights switching on"

[rappy19]

why does my LG p500 screen and buttons keeps on switching on sometimes even though i dont press them?? pls help me..

 

[natasrd]

why does my LG p500 screen and buttons keeps on switching on sometimes even though i dont press them?? pls help me..

My phone just started doing the same thing.. if you find a fix please let me know. I've searched everywhere and all I can find is people with the same problem, but nobody that knows how to stop it