Question about InFocus ScreenPlay 4805 Multimedia Projector

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Infocus 4805 projector

When i turn the power switch to on the fan keeps running and doesn't shut down, the bulb is not working and the light next to the power switch which usually shows if the projector is on is also not working. It doesn't show green or red.

can you help me?

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There is a cooling off period that your projector will do in order to make sure it does not implode or improperly destroy your lamp. It is very fragile and each time you turn on your projector it lights up almost like you would light up a candle. Each igniting of the lamp creates a decrease average of 3 hours per turning it on/ff.

also, have you tried another lamp and reset the hours, or cleaned out the filter at all?

Let me know how things go for you. I wish you well and hope that helps fixes the problem.

Posted on Oct 27, 2008

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I think the problem is the ECA controller (main board). It is through this that the fans are powered. Try to measure the voltage supplied to it (CN377 on the board for the larg lamp fan CN376 for the smaller fan), it shouldn't be less then 5v this can only be achieved if you activate the lamp door switch by jamming a piece of card board in it and powering the projector up. Take caution, and don't touch anything else, high power voltages are also present. You could also try to supply the fan with an external supply 6 to 12 volts after you unplug it from the main board, to make sure the fan is OK making sure of the correct polarity, red wire is +, black is -.

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