Report "I have a Maxent Plasma model MX58HPT51 that has been turning off by itself. After being off for 8 hrs at night , I can turn it on in the morning and it will stay on for about 30 min. after that I will continue to turn it on and it will only stay on for 5 min. I have already taken the tv to two different tv repair shops and they can't find anything wrong. Both shops had it running on the blue screen for a week and it did not turn off for them. Once I bring it home and connect it to the cable box it starts turning off again. I don't feel it is the cable box because it works fine with the replacement tv we have been using. the tv is 4 yrs. old"