Help Coloured lines in screen?

[Chiniboo]

just recently i got coloured lines running down my phone. at first it was covering half of the screen, now its all of it.. when i bend the phone, the lines kinda go away untill i let go.. i didnt drop it or anything.. i think its from heat.. is this something i can fix myself? how much would it cost to replace? and would it be covered in the warranty?

 

[Tyseyh]

Warranty, take it back.