I am having right the opposite from most problems I have read....

yes, this problem is called intermitent power. The is not enough volts on the power board. Mainly because there is a loose or burnt out connection on the board. With a digiatl meter, perform a resistence test. (If familiar with process)If you have soldering exp. You can resolve this problem yourself. Otherwise, it will require replacing it. I have a unit here with me with the same problem. Once i look into it, I will share any additional info i feel may be useful.