Question about InFocus ScreenPlay 4805 Multimedia Projector

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SP4805 bulb does not fire up; led stays green; fan turned on

I have SP4805 bulb does not fire up after the beep sound; led always stays green; fan turns on. Replaced with another bulb. Same problem.

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There is a problem in the ballast.refre to service personnel
shyam
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Posted on Feb 08, 2009

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I had the same problem after purchasing a new bulb. My husband pulled it out after it would not fire up and the new bulb plug in conecter (white with 4 holes with two wires) was different. Take your old bulb and compair the two conecters and see if they match, then check if the wires are in the same slots as in first and last. Mine on the new one were in the first and second to last slot. So we took the wire out of the second to last and put it in the last slot and installed it and it fixed the problem. We also had to unplug and replug it in and do a master reset by pressing the Power and Channel buttons and the same time for 15sec. Hope this helps.

Posted on Jan 28, 2009

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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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