I am having similar issues to jenichol. original bulb went after about 2 years.
Bought 2 after market bulbs from electrified.com.
First bulb worked fine for a few weeks, then stopped, didn't look damaged.
Tried the second bulb, this worked fine, after a delay of several minutes.
Recently, this bulb has stopped working properly.
Sometimes it'd try restarting, then end up with the red LED. if I unplugged the TV, then restarted it would usually come on normally, after a delay. Now I cannot get it to come on at all.
Do you think these are bad lamps, or is it still possible the Light Engine is faulty? I don't want waste time and money swapping these for the more expensive OEM, if the Engine is bad any way. Is there anyway of knowing, without bringing a service engineer to open it up?