If you have an old CRT projector bulb, then you might want to at any time to ensure that equipment is functioning properly. Despite the high-tech era, it is different from CRT monitors CRT projector. CRT projector, for each computer on behalf of the main colors (red, green, and blue - RGB), there are three separate bulbs. So if you want to use your CRT projector, the best way to do the test lamp. You will be able to tell all the projection bulb, if running from a range of colors on the screen.
  Explain
1 Connect to your CRT projector, video or computer equipment.
2 Switching the projector and allow it a few minutes to warm up.
3 Something to play through the CRT projector, the image on the wall. If the display is correct, then all the fine of three light bulbs. Without them, and then decide which bulb color is lost. Once you have completed this task, you now have to check the CRT  projection bulb and test.