First, let's unplug the printer and then plug it back in after thirty seconds. Can you also tell me if you are plugged into a wall outlet, surge protector, battery backup, or power strip? Beyond that can you check this link for any firmware update that might be available :
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?cc=us&lc=en&dlc=en&product=439324
-Spencer
