Many Mitsubishi projection TVs have bad control panel switches. These switches fail and lock up the TV's computer, disabling everything. If you can unhook the control panel, the TV will work fine with the remote. Remove the speaker grill. Pull on the sides, it should come loose with a little effort. Remove the access panel by removing the 4-6 screws using a philips screwdriver. Follow wires from control panel inside to the connector labeled "DZ". These will be the thinner wires, not the thick ones that go to the video jack. Unhook this connector and the TV should work with the remote. You can replace the switches, but the Mitsubishi buttons sometimes will just fail again. Using another brand of switch may be more reliable. Better to just use the remote and let the buttons be useless. Nobody uses these usually anyways. Some models will require you to unplug the TV for a minute, and then plug it back in and wait about 2 minutes before the TV will work again (reboot the microprocessor inside). The biggest issue with repairing your TV by unplugging the control panel like this, is that you no longer have the green LED on the front panel. Many Mitsubishi TVs will flash the green LED for about 90 seconds and then the TV is ready to turn on. Without this panel connected, you just have to remember that you need to wait 90 seconds after plugging in AC power before the TV will be functional. If this fix does not help resolve your "dead" set issue, you likely have a bad power supply or bad signal board. The way to know is to check the +5 volt standby line inside. You can check this on the same connector to the front control panel for an easy check, without opening up the back. Just check all the pins and one of them should have the +5 volt standby sending power to the switches. Use the outside of the video jack as your cold ground. Thanks and good luck!