In addition to the program selection and volume adjustment effectively at the same time. The other function keys are failure. JD9service manual download site
 JD9service manual download site
The reason is strayed into the hotel. At the same time hold down the "volume -" key on the TV and the "time off" button on the remote control, out of the hotel mode; Also hold a "volume" button on the TV and the "display" button on the remote control, white raster to appear on the screen, then click on the "N" key, out of the hotel mode.JD9service manual download site