I have 2 Hanns G HG281D LCD monitors. Both are having the same issue. They're not both hooked to my pc, just one. The other was my father's.

I dunno if it's important, but in Poland we are sitting at 230 V AC, 50Hz main line voltage. The power supply output to the monitor is the same I'd imagine, no matter where you are.

When I turn it on, it goes normal for a few seconds. Then the screen goes black, after a few seconds it goes back to normal, then back to black again.

It alternates between black screen and normal screen in random intervals and each state...