Probably pretty basic but I need help hooking up my Onkyo TX-SV515 to newer Dell HDTV. There are all the usual hookups on the back of the TV with the exception of a small panel by itself with 4 unused plugs: S Video, Video (yellow), Left (white) and right (red). I am not hooking up any other components except a DVD player which is already in place. Would someone please give me a little assistance? Thanks.
Those would be used for older video sources that use composite (yellow RCA jack) or S-Video connections and red/white analog audio connections. This would be for a VCR mainly or I've seen some MP3 player docks that use this as well. Zune comes to mind because I have one.
That's a old stereo unit with virtually no AV capabilituies beyond a yellow composite video output and to use that to feed a nice, new HDTV would be a sacralige. You can't hook your TV to it but you can use it with your TV if you're flexible.
Feed your video sources directly to your TV using the best possibe connection, most likely HDMI. Use the TV for video switching.
Likewise, run all your red/wite audio connections to your receiver and use that for your audio switching.
But, some (not all) TV's have red/white analog outputs on them that MIGHT feed everything fed to them out and to whatever it's pluged into. If you get lucky and have that, you won't need to connect your sources to te receiver. Your TV will do all your video/audio switching. Check your TV's manual to see if this is even possibe and how to mute the TV speakers when you want to use the receiver for sound..