I am using a RD-JT 91 or 92 Premium DLT Projector - mounted pretty high in a roof. The projector cannot be switched on. No LED indications are shown. Around the centre control bottons, 4 blue LED's are flashing similtaniously - indicating we have power at the unit, but the manuel has no troubleshooting assistance to indicate what this in fact means.
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make sure the lamp door is engaging the safety switch. make sure the colorwheel spins also, it the colorwheel doesn't spin up the projector won't start.if thats not the problem you need to check the resistance on the thermal switch which is on top of the lamp housing. it should be infinite. if thats not it it could be the power supply or the main board.
okay most people think well its not hot up there but truely it is hot toward the cealing. If its overheating on the roof mount try to use a wall mount instead.. If they have it running for 5 days streight then is something your not oding right here and that might be the mount.
There is basically two ways to reset the lamp timer :
1. ) On the Projector's physical buttons
Arrow Keys - Up , Down , Left , Right then Menu and Enter - this should be done quickly whilst the Projector is in standby mode.
2.) Switch Projector on - Hold in the Up Arrow Key on the physical buttons on the Projector untill a PIP screen appears - then just follow the on screen steps.
I have just reset my lamp! Disconnect all cables but the power, switch on it will search for a source, the lamp timer message will display press exit untill it will give you a message to press menu to reset the lamp timer, it will give you a option to press left or right to reset. I used the buttons on the projector not the remote.