This is a very new unit, used on a couple times.
when I power up I get a quick flash from both the temp and lamp as well as the blue power button. the fan starts and in a moment the lamp comes on.
After about 4 mins the whole projector shuts down. The lamp, and the fan.
I'm sure it has to do with overheating and that this is an internal safety feature but what is causing this. This is a new, pristine device.
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It could be the temp sensor going bad. This sensor sits on top of the
metal housing which the bulb assembly slides into. The bulb assembly
will have a hole on top and this is where the sensor is above. There is a
small blue and white wire that plugs into it. If you pull the wire out
and put a paper clip or wire in the coupling you will basically bypass
the sensor connecting the blue and white wire. If your tv turns on then
that is your problem. Its cheap too. Here were my symptoms..1] Turn tv
on 2] Bulb would light up..(which eliminates the ballast) regular
picture would show up (which eliminates the bulb and color wheel) 3] 30
seconds later tv would shut down with 3 flashing lights. After bypass
the tv turned on as always and hasnt shut down yet. Always un plug tv
first. Get the replacement part to avoid overheating and possible fire
I wish you had received a relevant answer to your question, as I'm experiencing exactly the same thing here. Not sure is this site notifies people when they get responses, but did you ever figure out what the problem was?
Just a quick couple of notes about your projector. It is a DLP projector (not LCD) and as such the machine as no air filters to clean. It does have air intake and air exhaust grilles, but no air filters to clean. This next part comes directly from the owner' manual for your projector:
When the lamp operation time exceeds 2000 hours*1 *2, the projector automatically shuts off and can’t be used until the lamp is replaced and the lamp operation time is reset.
Your machine is designed to give visual warning messages at 1500 hours used, and 1900 hours used. Did you see any visual warning about lamp life over the past few months?
If you were experiencing an overheating problem, a "TEMPERATURE!!" message would flash up on the screen just before the unit shuts down. If there is no warning, you don't have a heat problem.
If you have a replacement lamp available, install it and reset the lmap hours according to your user manual. If you don't have the manual, google it on the web (it available).
It sounds like your approaching the end of your lamp's life. Most projection televisions have internal lamp timers. These lamp timers usually give you time to buy a new bulb before it needs to be replaced.