Model 19PRC1-0121
Chassis 19G01-00aa

Found this set by the side of the road, it is stuck in the /demo mode,
is there a way to get it out of this mode? I do not have the remote.
As soon as I plug it in it starts its "sales pitch", the only way to
stop it is to unplug it. Front buttons have no effect.
Any help would be appreciated before it goes back to the side of the
road.
Thanks Tom