Two of mine (FSM-270YG LED) just arrived yesterday. Seemed all was well until the second monitor warms up after 30 minutes to 1 hour and then randomly turns blank (appeared like signal loss). Turning the screen off and on again yields a picture for about 30 seconds or less until it happens again. I've just contacted the seller so I'll see what happens. The other monitor works fine though. Can't fault the panel though it seems the circuitry behind it can be a bit shonkey.