Video signal problem

Happy New Year 2006 to one & all!

I'm currently having an issue with my Tivo Series1 and wonder if there's a quick fix to my video issue.
When I go to Setup/Recorder/Connection to Recorder, Status : No video,
despite confirming various troubleshooting steps to confirm my video/audio/svideo cables and set-top box are functional.

Have using this tivo for the past 10months without any issue. However, am not sure if this video issue has any relation to changes in files I made couple of days ago in /etc/.. tclient.conf, ppp-options and also created /etc/rc.d/rc.sysinit.tivohack as suggested in http://minnie.tuhs.org/twiki/bin/vi...ithBuiltinModem

Video issue occurred after I made changes. However, when I reverted backup files made prior to changes, it wouldn't any do good to my tivo. My thoughts is that the changes I first made may have modified some other system files.

Any suggestions or fix would be very much appreciated.
Thanks in advance.
:p