Hello, I have a 61" DLP Samsung TV and at times it shuts off. I have replaced the color wheel which fixed the original problem of not working, cleaned all the dust out of the TV, and replaced the bulb with my spare. The TV will run for a few minutes and shut off with the green lamp light. I unplug main power from the wall for a few seconds and then re-plug it back in. The TV will come back on for a few minutes and I would redo the process from above and finally it will work for a while. I have reset the bulb and made sure that the door switch was closed…any suggestions?