thanks pacifico for your input. the sp-6t would also cycle from bright to dim before shutting down. eventually the lamp would only light for a few seconds before shutting down. i opened the boxlight and the eiki to see what i could r & r. i switched the heat sensor(i think) thats located in the lamp area,(it is about the size of a quarter and about 1/4" thick that is held in by two screws, and has in and out wire.). anyway i felt it would'nt hurt to try. reassembled boxlight. powered on, lamped up, and received signal, i watched it for approximately 10 to 12 minutes without shutting down. it did cycle from bright to dim once but picture was nice. i will be running it for a longer period to see if it eventually shuts down. i'm keeping my fingers crossed.

boxlight sp6t prematurely shuts down. powers up normally, receives signal, displays nice bright image. after approximately 2 minutes projector shuts off. doesn't seem to be overheating (overheat indicator does not luminate) fan works, filters clean, air flow seems ok. thought it might be bulb so purchased bulb, installed, reset timer but still have same problem with shut down. any suggestions?