Tonight I noticed the on the front of my HL-P5085W the green LED light that usually flashes when a remote button is pressed is constantly flashing. It flashes numerous times very fast and then flashes twice at a slower pace. The TV is working fine otherwise it seems. I just replaced the lamp in it a few months back with this (Samsung BP96-00677A DLP LAMP Enclosure Replacement (BP9600677A)). The green light flashes when the TV is both on and off.

EDIT: Problem solved. My Denon DVD remote was stuck between a couch cushion and a button must have been pressed. Oops.