Have you tried the buttons on the screen, some of them may be sticky or jammed. If not, then your screen has finally reached its Expiry Date.
The best thing you could do, if you have screen compatible, is use a TV screen. When I am home alone, I bring my 32" down from my Living room, and use that, You will not get any interruptions. But your TV must have a VGA/PC input or, if your PC has one, a HDMI input