Samsung hln507 lights then goes off

My samsung hln507 started with picture would go off and still have sound. I would have to unplug to get it off then plug back it  back in then it would do it again in 10-15 min. Now it lights comes on for 20 sec then off with the three blimking lights. It will not restart it's self like it does when the bulb goes bad. I replaced the bulb 8 months ago and the color wheel 2 months ago. Im lost and don't know were to start this time. thanks