Is the reset procedure any different for the 2408WFPb? 

I've had two occasions where after briefly being disconnected from power (while the computer was still on) the monitor wouldn't power up as described.  The LED behind the power button shows green.  Also got it turn "off" so that it was yellow, but can't get any response from the monitor.

The first time it happened, I had to leave the monitor unplugged for a number of days, then it started working again with no issues for 9 months.