To troubleshoot a Mitsubishi DLP TV, access the Support section on the official Mitsubishi Electric US website, and select the Troubleshooting option. Select one of the available categories, and follow the instructions until the website provides you with a potential solution.
The Troubleshooting section covers the five most common problems, including the issues with the TV not having sound or not displaying a picture, the TV not powering on, problems with Internet and Networking, and issues related to the 3D functionality. When you select a category, you can click on the option that describes the way the indicator LED lights are behaving, and proceed to follow the instructions. The instructions typically involve a step-by-step procedure with pictures and diagrams that help you complete the process. For the more complicated issues, the website provides instructional videos.
After being used for a couple of years, the most common problem with Mitsubishi DLP TVs is the appearance of white dots on the screen. The underlying cause of that problem is a worn out DMD DLP chip. As of 2015, the price of a replacement Mitsubishi DLP chip typically ranges from $190 to $210, depending on the model. By following an online tutorial explaining the process, you can replace the chip within a couple of hours.