Laptop-to-TV audio on wrong input

Registration date
Saturday August 25, 2012
Last seen
August 25, 2012
I'm trying to connect an ASUS laptop to a Toshiba TV. I have a VGA cable for video, and I'm running a stereo jack to 2 RCA adapter from the laptop's headphone jack to the TV's audio input. Both the video and the sound work great... except the video comes through on the PC input, and the sound comes through on the Video input. There's a PC audio input jack on the TV, but the RCA jacks don't fit with it. I've tried going through the TV's settings, but nothing's worked -- the Audio Select button informs me that it's "NOT AVAILABLE." Is there any way to get the two to line up, or should I go buy an HDMI cable? Thanks.