key F11 is malfunction

[CW Fong]

Hi, my laptop Acer aspire d255 had a problem with the key F11 is malfunction, because whenever I am in the internet explorer or Google chrome the screen keep jumping from full screen to normal mode continuously. It didn't happen all the time but when this happens you virtually cannot do a thing except the shut down. When restart there is no guarantee the jumping screen stops.

 

[Narzter]

take that pc to a repair shop to get looked at