If the Command Mode setting is changed in the menu of the DVD recorder, the Command Mode setting on the remote control must be changed to match. Change the Command Mode on the remote control to resolve this issue.
If you are not sure of the Command Mode setting in the DVD recorder menu, you can scan through each of the available command modes on the remote control until you find the one that operates the DVD recorder. Another option is to reset the DVD recorder which will change the Command Mode of the recorder to factory default which is DVD3.
NOTE: For model-specific information regarding how to reset or change the Command Mode settings, refer to the manual supplied with the DVD recorder. Manuals are posted on your model support page.