Phillips 170b monitor not working. Hi, My monitor went black last. If I turn it off and on again

Question

Hi, My monitor went black last. If I turn it off and on again it lights up so you can see whats on the screen but then goes black. I've tried it through the USB connection and the same thing happens. I've tried just turning it on without it connected to the computer at all and the same thing happens. Any help would be very much appreciated.