Question about InFocus ScreenPlay 4805 Multimedia Projector

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My Infocus DLP 4805 can't turn on

I used my Infocus DLP 4805 as usual and the next time it won't turn on, it makes also strange noise and the light power turn red. I tried to restart it but it stop totaly to work. please help

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  • 28 Answers

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.

Posted on Jun 24, 2009

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Posted on Jan 02, 2017

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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

    Infocus 4805 - Doesnot display and make noise at start-up


    Well a single red blinking means the lamp won't strike after five (5) attempts. The "squeaking" sound if it's coming form the large fan usually always means the Mos-Fet fan speed controller chip has failed which presents sometimes as an intermittent squeaking sound. Which would implies the lamp may have failed from the resultant over temp. However if the squeaking noise is coming from the color wheel that would mean it's bearings have failed and if is is unable to phase lock at reference speed the lamp would also not strike. The odd symptom is the remote thing... That does not fit! If is actually is related to the common cause of all the problems... That leaves only the power supply has partially failed (not too expensive) causing all of these symptoms.

    Or murphy has moved in...

    Good luck!

    SagerTronics

    Oct 28, 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

    Infocus 4805 projector


    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.

    Oct 04, 2008 | InFocus ScreenPlay 4805 Multimedia...

    2 Answers

    Infocus SP4805 buzzing noise


    Hi dcabbarno

    The buzzing noise is a broken colourwheel and the shadow could be a part of the colourwheel that is obstructing the light engine or it could be your packlight pipe ( tunnel with 4 tiny mirrors in it ) that was damaged when the colourwheel broke.

    I do unfortunately not have the part numbers of the parts that I mentioned , but you could assist by opening up the unit and supplying me with the part numbers.

    The colourwheel you will spot straight away once you've taken off the top cover of the Projector , the packlight pipe is situated right next to it - looks like a small tunnel that's got 4 mirrors inside it - takes the light into the light engine.

    Once you've supplied me with these I can get you prices and places to order it from and will help you with instructins on how to replace them - it is quite easy to DIY.

    Thanks for using Fixya !

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

    1 Answer

    Infocus 4805 strange power cord noise (projector end).


    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.

    Apr 26, 2008 | InFocus ScreenPlay 4805 Multimedia...

    1 Answer

    Fan replacement


    Im sure noone has written out instructions. I can offer some advice. I have a dell 2300mp dlp projector which is similar.

    Take your time. if you start tugging on the case when taking it apart you can break things inside very easily. group your screws with other like screws and mentally note or use a label to know where they went in the projector. Make sure to remove the bulb before working on it. That bulb is almost worth more then projector and is VERY fragile. store in a safe place while working on it. While you have it apart use canned air to blow out the inside.

    hope this helps.. sorry i couldnt be more detailed.

    Jan 19, 2008 | InFocus ScreenPlay 4805 Multimedia...

    2 Answers

    Glass prism


    Greetings,

    Thanks for contacting us regarding your product questions or concerns. It appears you are wanting to know how to reach the glass prism from your 4805?

    My initial question would be, why are you looking to access the glass prism in your 4805? This is a very dilicate process internally of your projector which helps it opperate. Are you trying to self-repair your projector?

    Let me know. I'll be waiting for your reply.

    Dec 28, 2007 | InFocus ScreenPlay 4805 Multimedia...

    2 Answers

    Horrible noise


    it is the color wheel i have a similar problem and am looking for the part, the color wheel is a small electric motor that spins at a high speed and it can go bad. which will lead to the horrible squeel/hum/buzz.

    Apr 24, 2007 | InFocus ScreenPlay 4805 Multimedia...

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