Serial num 44021591 model num PR1310 C125

I have not worked on this model of set, but on many TV models, you can get it out of the demo mode by holding down the menu button for at least 10 seconds or longer.

If this does not work call the tech support for your set. They should have a definate answer. It is also possible that there is a fault condition with the set, and it is not properly responding to the front panel controls to be able to be put out of the demo mode. But, this is not a common type of fault.

Jerry G.