Many Schools use Toshiba Projectors. They are great projectors that are very tough and long lasting. However a problem will sometimes arise When the school is showing a video, and all of a sudden the image starts to flicker. Sometimes it may even turn black or white.
What causes this issue?
Most often its the photo sensor or color wheel.
Below is an image of a color wheel.
Projectors must be serviced. If they are not service they will collect lots of dust and cause problems with flickering even turning the image black and white.
The Projector will need to be striped down and repaired.
This type of repair costs only £99
The color wheel is usually situated behind the fan in the image shown above.