I've had my HL-S5687 for a few years, now, and never had any issues with it, until two days ago. I turned it on, same as always and everything looked fine. After a minute, or so, the picture went out (but I still had the sound). Didn't think much of it, as I occassionally bump the remote and accidentally switch the inputs. I looked at the remote, everything seemed fine. So, I turned the tv back on, everything came up, but again, after a minute or so, picture turned off, again. Then I noticed the 3 LEDs were blinking. Quick read through the manual says it's indicative of a lamp failure.
So, I pull the plug, open the rear, pull the lamp, re-seat it, close it back up, plug it back in, turn it back on, everything looks ok. Minute later, picture goes out, again. Turn it on, jump into the factory menu, check the lamps hours (10,400), picture goes out, again. Turn it back on, go into the factory menu, clear the lamp hour counter, picture goes again. I unplug it, let it sit a few minutes, turn it back on, everything is good - you guessed it, a minute later, the picture goes out.
So I guess my big question is, if the lamp still works for that one minute, and the lamp is past it's theoretical lifespan (5000 - 8000 operational hours), and far as the TV is concerned, it has a new bulb with zero hours (once I pulled the assembly and reset the counter, the tv shouldn't know whether or not the bulb is old or new), why does it still turn off and show a lamp issue?
Considering I don't hear any strange pops, fizzles, or crackles and I'm not seeing any rapid flickering, I'm assuming my ballast is still good. I don't have any color distortion or dark bands, so the color wheel and light tunnel are still good. The lamp still comes on and has a pretty damn good picture, so the bulb is still good. Since I'm well over the theoretical operational life of the bulb, it's not an automated "service reminder" lamp, like in some cars.
So, if all those pieces are doing fine, what is it that trips those lights and refuses to let the tv work normally, if it thinks I have a new bulb? Is there something in the lamp housing, itself, that can be bad? I've placed an order for a new OEM bulb and housing from apexlamps.com. It's not due to arrive until the middle of the week. Any information I can gather before hand will only cut back on any surprises.
I look forward to hearing any theories anyone might have, regarding this issue.