We have a panasonic 32"inch lcd tv.we want to

Hdmi Ports Qty 3 port(s) PC Interface VGA (HD-15) HDCP Compatible Yes

I read your tv has 3 hdmi ports and a PC input.

if your pc has hdmi out - the you use a hdmi cable from the pc to the tv on one of the hdmi inputs.

if your pc has a 15pin vga cable you can unplug from your PC monitor (or go buy a VGA cable if you want to keep one on the tv and one on your pc monitor - or if you are using a laptop).

when you unplug the computer from the monitor .. check the pins - should look to be about 15 pins in the connector. it that will plug into the tv- then you are using a vga cable. if it will not plug into the tv pc input .. don't force it. It could be a dvi connector . .take the cable off the PC and to radio shack and they can fix you up (you need a dvi to vga cable - not likely, but possible)

I always turn off a pc before disconnecting monitors - and plug into the other display before turning the pc back on.

Good luck.
Bill.