BTW, I don't know if it's the same for 931BW, but my dad owns 926BW and it is fvsking annoying. First, when monitor goes into standby when you turn off your computer, the power led starts blinking every second. This in itself is super annoying. Why Samsung couldn't just install dual color led and turn it red or yellow to indicate monitor is in standby, why do they insist on bling blinking? Second, I think half of the power consumed by the monitor must be going to light the power led. It is so bright that in the night it illuminates half the room (I'm not kidding here, think sunbeam rheobus blue leds kind of brightness). It's not so bad during the day, but if you intend to put it in the same room you're sleeping, be prepared to manually push power button on your monitor every night.
My 244t does the same thing, and it BUZZES [very quietly, but with a dead silent room and no tv on, you can hear it]. Buzz. Buzz. buzz. Buzz.
It makes me wonder if other samsung panels do that too. Thats plenty of reason not to buy one.