I have a slingbox 350 that I have not used in a while. I switched from Satellite service to Cable about 6 months ago. When I try to use the slingbox now I get audio but not video. Everything seems to be hooked up ok. I have looked on the help pages and they suggest to switch from HDMI cable to component video cables and I have removed the HDMI and installed component video per instructions. I have also power cycled after the switch from HDMI. Still no video. I am with Rogers Cable in Canada, have a Nextbox (Cisco) DPVR box and a Slingbox 350. I have seen some people talking about switching from 1080P to 1080I or 720 but I do not know how to do this. I get the error that 'the connected video signal is not supported'. Anybody have any other advice to fix this?