Question about InFocus ScreenPlay 4805 Multimedia Projector

1 Answer

No pwer to Infocus sp 4805

The projector does not power up. Is there a fuse I can change? How can I troubleshoot the power supply? Thanks

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  • ernielucas Sep 29, 2008

    We were in a party last night and am supposed to show a Powerpoint presentation using my 4805. After making the connections, when the 4805 was powered on, there was a spark/smoke at the point where the power cable touches the DVI cable - it burnt the cover exposing the aluminum coaxial. (FYI, we did a dry run of the presentation in a different location and there was no problem). The laptop then failed to start and the 4805 turns on (you could feel the fan) but the lamp is off as well as the LED.

    We tried looking for a fuse thinking it was burnt and we couldn't find one. The manual and drawings also do not show any fuse anywhere. Can I still save my 4805?


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1 Answer

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...



Posted on Oct 13, 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

    Screenplay 4805 not anything. I plugged it in, heard a pop, and then tried to turn it on, and nothing happened. No fan, no light. Could this be a fuse?


    Yes, it could be the glass fuse on the power supply/ballast. If you remove the top cover you should see it clearly if it has blown.

    Aug 06, 2010 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    I need power supply for infocus 4805 screenplay


    You shold buy 520-0143-00 ECA, POWER SUPPLY, X2 Use if S/N contains an A in the fifth from the right digit "AMMxxxxA0000" 520-0126-00 ECA, POWER SUPPLY, X2 Use if S/N contains a zero in the fifth from the right digit "AMMxxxx00000"

    cost about $90

    May 23, 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

    Random and unusual fan noise


    give me a mail adress so i can send you. i have a website its turkish but guide is english i downloaded it
    waiting fo you

    May 29, 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

    Replacement parts


    No, I still have not been able to find the parts. No one has responded to my question as to where I can get them. Any help would be appreciated. Thanks.

    dcabbarno2@aol.com

    Jul 20, 2008 | InFocus ScreenPlay 4805 Multimedia...

    2 Answers

    Projector will not power on


    Check your cooling solution wether its a fan malfunction or if it needs a new fan - or h20 cooling system

    if not its either the power supply or something serious - send it to manifacture or go to a in-store repair

    (it could be the dust protector)

    Nov 16, 2007 | InFocus ScreenPlay 4805 Multimedia...

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