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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1,Check the fans ,whether the fan is running,when you turn on the projector
2,if the fans run, then ,check the lamp or lamp ballast
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Here is some information on this model which I hope will help...
The lamp indicator lights when the lamp is due to be replaced. It will flash if a circuit abnormality is found. The temp indicator lights if an abnormal temperature is detected. If it goes too high it will shut down flash.
The lamp indicator is furthest away from the power switch if that helps.
If the lamp timer was approaching the end of the lamp life you would see a REPLACE LAMP nag screen when the projector is turned on. The fact that you have not mentioned this suggests that this is unlikely to be the problem.
The filters on the model are on the underside. There is a removable panel directly under the lens. You should not use canned air as you are blowing dust into the projector. It is recommended that you use a vacuum cleaner. Filters should be cleaned every 100 hours and replaced when the projector is relamped. You can wash the filter by hand with water only, ensuring it is dry before replacing it. Do not run the projector without the filter in place.
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.
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.