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Topic: boxlight sp6t shuts down prematurely
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Joined: Jan 22, 2007
Posts: 11
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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?
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Joined: Aug 8, 2005
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This is the same issue I had with an Optoma H31 back about 2 years ago. I sent it in and they reported that the unit was DOA. They never said what the issue was. I have seen this kind of problem turn up on this forum now and then. Usually the owner has been forced to send the unit in for repair. If the filter is clean, the overheat light doesn't come, ect. It might be something that needs repair. You said airflow is good as well, so this means none of the vents are blocked either. I wish I had better news for you
Experienced with Yamaha Dpx-830sl, Mitsubishi HC1500, Infocus SP7210, Optoma HD80, Optoma H78DC3, Optoma H27,Optoma H31, BenQ 6100,Infocus 4805, and many others.
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Joined: Jan 22, 2007
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thanks, i have a clone projector (eiki sm2) that has image problems that i should be able to r & r components to solve the problem with the boxlight. i was just hoping it would be something simple to repair.
thanks again for your post.
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Joined: Apr 30, 2004
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Quote (lakesdad on Mar 21, 2007 6:44 AM):
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?

I have this identical issue with not just one but two projectors, a NEC LT260K and an InFocus IN26. The NEC worked flawlessly for two years and then started shutting itself down in exactly the same manner described above, plus before shutdown the lamp shuttles itself between bright and dim modes a few times. Old bulb was only half used up; new bulb didn't help. Two repair sessions at NEC's local authorized service shop (Projector Doctor in Poway, CA) didn't help either (they "couldn't duplicate the problem" but performed billable service anyway, at a cost of around $500, plus $400 for the new bulb). The NEC is now with NEC service in Illinois.

I got the IN26 to fill in while the NEC is down. A good projector now available at close-out prices, but it started shutting down after only 4 months of use. I called InFocus and was told to clean the lens and move the projector to a ventilated area (useful advice! ).

Is this lamp issue endemic among front-projectors?--maybe the bulbs or the projectors all come from the same factory where quality control has failed.

But here's a strange wrinkle: my Adcom GTP860II surround processor/preamp, which has nice video switching facilities, also started shutting down unpredictably after two normal years. Adcom told me the display on this model can draw too much current and shut the preamp down (why now?). So it too spent 10 weeks at Adcom's local authorized service (All Tech in Mission Viejo, CA) and just returned with the problem unsolved and probably unduplicated there. I've had my AC wiring checked, no flaws in it. Looks like an epidemic of lousy electronics quality.
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Joined: Jan 22, 2007
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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.
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