does it lose signal or goes on and off power by itself
Neither, the power on the monitor stays on, but the screen goes black... Videocards are fine, I checked them with another monitor. I noted that if I turn the monitor off for 10 minutes or so, then turn it back on, the monitor will stop blinking for a few minutes, then goes back to alternating between a black screen and normal display.
I just bought this monitor a few days ago, it worked just fine initially... I am rapidly forming the opinion that this is just a faulty monitor. I'll take it back today and exchange it for a new one, see what happens...