I want to start by giving a onlien viewable manual.
http://inform3.kenwoodusa.com/manuals/dvr505.pdfYou can try reseting it back to factor settings by:
This might help if any settings have gotten changed some how.
WarningOperation to reset
The microcomputer may fall into malfunction (impossibility
to operate, erroneous display, etc.) when the power cord is
unplugged while power is ON or due to an external factor. In
this case, execute the following procedure to reset the
microcomputer and return it to normal condition.
÷ Please note that resetting the microcomputer clears the
contents stored in and returns and to condition when it left the factory.
THE STEPSSet the POWER switch to ON (set to Standby
mode). Then press the >>| key, |<< key and STOP
key in this order.
Good luck.