Question about InFocus ScreenPlay 4805 Multimedia Projector

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Infocus 4805 Lamp will not ignite after new bulb and reset.

Hello, my old bulb burnt out, so I bought a replacement bulb. That bulb did not work, so I borrowed a working bulb from a friends projector and it did not fire either. I confirmed the new bulb had the connector pins in the right place, I also tried the reset suggestions I found here about holding down both volume buttons for 10 seconds. I am getting the red blinking light... the projector tries to fire up five times then quits trying.

Any ideas/suggestions... I am very capable of using a meter and working on electronics, I just dont have a schematic.

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  • mynameisgon May 16, 2009

    Yep same problem - died mid movie without warnig - now 1 blinking red light. Have reseated the lamp module and cleaned - checked terminations (as much as possible) but still dead. Found a lamp for £165 but loathe to spend the money when you have said your replacement lamp still did not fire.

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Hi my name is walter I have a infocus 4805
It was working with just a colostream , component out from my dvd- Player but I wanted to play my blue ray movies so I got me a Cable HDMI to M1D and decited to plug it in I click on menu on remote
And try to set it to the correct source no picture, and I guess on my remote I press Button( presets ) then menu image was still on but remote comand Did not respod I traid all the buttons on the remote none responded Untill I decited to unplug the infocus 4805 and I turn it back on the lamp light did not come on , but there is no blinkin red light on my 4805
If some one can help I will be greatfull THAK YOU in advance
? also I have Question if I decited to open my infocus is there any way To reset the internal computer from my infocus 4805 ?

Posted on Feb 23, 2010

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It there is no high-pitched squeal when it starts up, the colorwheel needs replacing. the lamp won't light without it. the part is under $50, but installation is quite involved.

Posted on Aug 03, 2009

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1 Answer

Just replaced burnt out bulb in Infocus 4805 projector. Great picture with new bulb but only black and white. Is this a bulb issue or something else in the projector?


This is most likely the color wheel. When the bulb blows, it can damage the color wheel. The color wheel is a wheel composed of thin layers of colored glass that spins in front of the projected image. It is possible to repair it with super glue, but the best way is to try to find a new one to buy.

Dec 29, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

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...

    2 Answers

    How do i find out if i need a new lamp for my infocus 4805. when i turn it on the fan blows for a cpl secs and the green light blinks a few times, but i dont get anything saying the lampis out


    when you power it on, do you hear a high-pitched whir? if not, you need to replace the colorwheel. it's also the colorwheel if you hear a buzzing instead. if the colorwheel does not spin, the lamp won't come on. if the colorwheel is ok, check the lamp. is the screen on the side of the lamp clogged with dust? is the inside of the lamp bulging, spotted, or foggy? if so, replace the lamp and clean out your projector with canned air. dust blocks air flow and keeps in the heat. this shortens the life of your lamp and projector. if you do need the colorwheel replaced, you could get the part from an infocus service center and do it yourself, or send it in for repair. either way, try av solutions in ny. they're really good. www.avsolutionsny.com

    Dec 27, 2009 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    I have a 4805. when i turn it on it does not


    most definitely. the lamp will dim with age and dusty conditions. just replace it and reset the lamp timer. also, the colorwheel might be dirty, too. but it's easier to replace than to clean (not recomended).

    Jul 11, 2009 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    Lamp on my infocus 4805 keeps blowing. This is the 3rd one.


    don't forget to clean your pj all 250 hours of utilisation!!

    Mar 08, 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...

    1 Answer

    New bulb installed and it takes 10 plus minutes to start


    Exchange the lamp under warranty...
    You've tried almost everything else.
    It's not that uncommon to experience "infancy failure" with a brand new lamp.

    If the problem persists with the replacements replacement then I would suspect the Lamp power supply (Ballast) is failing.

    Dec 14, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    ---------->> My Infocus Screen Play 4805 -Popped*


    Hello David,
    The best way to find the best price is to do some hunting/research. Google "infocus 4805 lamp"
    and wade through to find the best price.
    You will find instructions on the lamp replacement procedure in the manual. If you dont have the user manual browse to www.projectorcentral.com and search infocus 4805 and on their spcifications page there is a "user manual" Acrobat PDF icon.
    click on the icon to open the manual in pdf format

    Take Care!

    Jun 17, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    Replacing bulb


    hold the volume up/down in ,switch unit on while holding these in for 30 secs, if that fails, flash unit with new software.

    Dec 01, 2007 | InFocus In Focus SP-LAMP-021 Replacement...

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