LG Electronics LRM-519 Digital Media Recorder "menu locked blinking screen" Questions

...screen of the DVD recorder and I can't get access to the setup menu. Any suggestions about how to get to the setup menu so I can change it bace to DR1? The remote control for your DVR has the ...

...menu screen will not come up. Any assistance that can be provided would be appreciated. Not the solution but it has been suggested to remove and replace the CMOS battery. Can anyone help me finding ...