I have a infocus that produces pin hole lights on screen
I have a infocus projector which I bought in October 2008 - Last week I noticed the picture on my projector had a very small almost pin hole light. Since this time I have now over 100 no's of these samll pin hole lights overe the picture at random. Can you help me to understand the porblem and the soloution - the bulb shows about 1000 hours use
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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.
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.
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.
try reflashing the firmware, check your cables by wiggling the ends coming out of the projector and watch the picture for any changes, if it goes to normal at any time, your cables are just worn out. if that doesn't do the trick, maybe your lcd polarizers are burnt, i really need a better description of the picture.
Have you cleaned the inside of the case out? It may be dusty and dirty. UNPLUG FIRST! If you can carefully remove the cover and inspect. Use a vacuum in reverse or canned air to blow out loose dust and debris. Clean or replace any projector filters.
Single chip DLP projectors use a spinning color wheel between the lamp and the DMD (mirror chip) to produce colors. If the wheel rotation/synchronization is disturbed, colors will not be displayed correctly. In my case it looks like the wheel became un-synchronized, probably because the projector was dusty/dirty inside (a light senor is used to detect the wheel position), resulting in a grainy, slightly flickering image. I simply blew out the components with a can of 'Dust-off' and, using a small tool, rotated the color wheel by hand to make sue it wasn't rubbing or jammed. I reassembled & started the projector and the image was back to normal.