Question about InFocus ScreenPlay 4805 Multimedia Projector

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Infocus 4805 strange power cord noise (projector end).

My projector has done about 300 hours ,it works fine, but i have noticed that when i connect the projector to the power outlet it make an oscillating sound form the projector end of the power cord and all this happen when i have not yet put the projector switch on. When i put the projector on it still makes that noise till the end , till i put the mains off the noise goes away. Some times the noise goes away even when the movies are on.
What could be the problem. Should i worry about it. Thanks

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Try to replace the power cord and see if it makes the noise again.  if it does, then there might be something wrong with the acutual projector, that I wouldnt be able to help you with and you might want to worry then.

Posted on May 11, 2008

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My Infocus 4805 is just showing the INFOCUS logo and not showing the picture from the TV. all connections are correct but no signal....help


Powering On
  • If your InFocus 4805 projector is having a hard time powering on or doesn't power on at all, it could be one of two things. Due to the extreme temperature of the lamp that causes the temperature of the projector to rise, every InFocus 4805 projector has a cooling system. Check your projector's cooling solution, as it may need to be replaced. Also check the projector's fan---if the fan doesn't spin, the unit will not turn on. If the problem is the fan, you'll have to get it replaced. You can do this at the same place you bought your projector.
  • The Lamp
  • If your InFocus 4805 Projector powers on but does not project any light, the lamp will need to be replaced. All projector lamps must be replaced at some point---how often usually depends on how much use the device gets. Simply order a replacement lamp, unscrew the old one and screw the new one in. The projector will then work like new.
  • Color Wheel
  • If your InFocus 4805 projector powers on and is displaying images but the colors on the images appear warped or are not in the proper places, your "color wheel" will need to be replaced. The color wheel is a small device that essentially acts like a prism. Light is projected through it and it displays the appropriate colors on screen the way they appear in the original video source. Order a replacement color wheel that fits your model and use your instruction manual as a guide as you swap the old one out and put the new one in.
  • Aug 08, 2010 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    My Infocus DLP 4805 can't turn on


    very possible the lamp is bad. Many projectors will not even power on once the lamp burns out. As for the strange noise, there may be something more serious wrong with it.

    Jun 22, 2009 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    My bulb went out on my infocus sp-4805. I bought a new bulb, and replaced it, and it worked...for five minutes. the picture went out, and it was overheated. I took some parts off, and sprayed can air in...


    The fan is probably on it's way out and cannot produce enough air flow to cool the lamp. Replace the fan with the same ratings as the original and it should work fine. The only other thing would be a problem with the power supply not supplying enough power to the fan, but, a bad fan is more likely.

    Feb 24, 2009 | InFocus ScreenPlay 4805 Multimedia...

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    Infocus 4805 color mostly red when using componant cable


    This problem can be caused by several things.
    Most commonly a poor connection involving one of the rca component connectors or a failure involving the component output of the source.

    However what also works like magic is to press the auto image button that's on the projector itself and it will re-sync / re-define correctly the component source and presto it looks good again.

    A power brown out can cause this to occur and a simple "auto image" reset will fix it!

    Good Luck!

    Jan 09, 2009 | InFocus ScreenPlay 4805 Multimedia...

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    Color wheel in my InFocus ScreenPlay 4805 projector


    The 4805 Color wheel part number is 525-0146-00

    You can buy it from AV SOLUTIONS in NY

    As far as if it's worth it... That's up to you.



    Nov 07, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    Infocus 4805 blinking red light problem


    My first questions is:

    Is this the first lamp you have placed into your Infocus pj? If not, did you reset the hours when you did it last time? Otherwise that can also confuse the projectors internal system thinking there is NOT a new lamp in there and there for make it stop working once the clock hours are expired and over the 3000-6000 suggested hour life.

    Let me know so I can help trouble shoot other possible problems.

    Oct 27, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    No pwer to Infocus sp 4805


    My 4805 made a loud pop noise and smoke and died.

    I thought it the bulb and wasted $340 on that purchase.

    They are subject to overheating and the main circuit board may be fried.
    It cost me $50 for a tech to confirm my suspicons of the same.

    Look at the main circuit board and you might idenify a scorched
    overheated area.. My shop told me you can purchase a new main
    board.. Diagnosed by no power to the bulb...



    Sep 12, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    4805 w/less than 300-400 hours has blinking red light


    Yikes. I bet the bearing is bad in the fan and/or the fan is rubbing up against something. It might be an fix.

    Jul 16, 2008 | InFocus ScreenPlay 4805 Multimedia...

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