No color hello, i have two problems with my infocus screenplay 4805. first, it displays a dark line on the right side of the screen. second, There is about 3,600 hours of usage on the lamp and it now showing only in BLACK & WHITE.

hi friend,
please try to clean the testing diode of color wheeel.
Jack

The Light Pipe inside the projector has collapsed, through which light is passed.

Your light pipe has collapsed. Its just 4 pieces of mirrors shaped into a tunnel. One of your sides has come unglued.

It will be the light tunnel. Apparently it is very common in the 4805. See here for how to fix it, by the way you cant get parts so its a DIY job.
http://www.avsforum.com/avs-vb/showthread.php?p=6744737#post6744737

Your light tunnel may have collapsed. This is made up of 4 tiny rectangular mirrors glued together to make a tunnel.

the light tunnel has collapsed and needs replacing. the part is inexpensive and relatively easy to replace. if you can get the part from infocus or an authorized service center (part # 306-0095-01), remove the top (4 brass screws and 4 silver screws on the bottom, 2-3 silver screws on the back), next to the lens is the colorwheel. remove the 2 black screws on the colorwheel base, 2 black screws on the metal tunnel frame side, remove the tunnel glass. replace, and reverse the instructions to put it back together.

I am Brasilian and i don't speak english very well, so sory. A friend had the same problem,and other friends too.

The mirrors and the Color Wheel of the Infocus sp4805 are atached with fragility by glue that with the high temperature and humidity deteriorates. The detachment of the color wheel or the mirrors drivers of light produce dark spots. It is easy to solve. Just paste again, but should be done by specialized professional.

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.

try buying a new colour wheel

clean the lens or get a new colour wheel