Your IC's on yjur convergence board have failed. The convergence board is accessed through the front of most projectors.You are looking for two devices with a number like STK 392-110 STK 392-150 or STK 392-180. These devices solder in, You may also find a burned resistor or two, and there may be a small fuse blown in the circuit. (not all have a fuse).
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