Display issues on Samsung J1

HI there again.

Well, A Samsung J1 is curiosuly switching off the screen when some function is attempted to be used and no matter what I do, the screen, when black, doesn't light up again immediatelly. When so I need to wait till her good will returns and the screeen light on again or disasemble the device removing battery and even though, some times doesn't return requesting again to remove battery till it works.

Recently the acreen is becoming shinny beyond normality but a bit blurry with some winks taking some time (a minute even less).

Besides the belief on a screen problem, this isn't a continuous issue but intermittent one.

Any suggestion?

Thanks + Rgds.

Marco