connecting plasma to tv?

[BrianG]

Find out the native resolution of the TV and set the computer resolution output to those values. Also, you might have to mess with the refresh rate on the computer as well - 60Hz is usually a good bet.

[JThiessen]

You also have to set your pc to do dual monitor output.
Right click your desktop background, get to display options/settings (in Vista, you first click on "personalize", then display settings), and you can set up the dual display stuff there, including native resolution changes. If that doesnt work, I'm fairly certain you may have gotten the wrong cable.

For some reason, I tend to think that the HDMI in wont support your analog display signal from the pc (HDMI relies on a "handshake" between the device sending the signal, and the device recieving it. One of the downfalls of the HDMI system). You should get a DVI-DVI cable (it will look just like the cable that goes to your monitor - your TV should have the same type of input. http://www.cablewholesale.com/specs/10v1-05301.htm

[sikeston34m]

I am currently using a RCA 46" lcd TV as my computer monitor. It rocks for Gaming.

I am using the HDMI-to-HDMI cable for the connection.

This is my "new" computer that I'm on now because my old one caught a power surge from a near by lightning strike. Well, it didn't like that, because now it is brain dead. No processor activity. The Bios is still active. It does follow the boot sequence. 1st calls for the DVD drive to check for boot disks, then spins up the hard drive, calls for the processor, then nothing. Motherboard/processor issues. I would like to repair this one if possible.

My old one was a HP:
3.0 Pentium 4
1 Gig of DDR ram
ATI TV Tuner card with 256 megs of video ram
160 Gig primary Hard Drive
400 Gig Secondary Hard Drive
Windows XP

The ATI Graphics Card worked flawlessly with this 46" and also previously with a 32" LCD. No problems at all. Plug and Play.

My New Computer is also an HP:
Intel Quad Core Processor - Q6600
4 Gigs of DDR ram
750 Gig Primary Hard Drive
Nividia 8500GT Graphics Card with 512 megs of onboard DDR ram - also a TV Tuner Card
Windows Vista 64Bit

With the new system, I simply unplugged from the old and plugged into the new. No adjustments at all.

Before you get carried away with alot of technical adjustments. Check the simple things first. Are you sure you have the TV set to receive from the input that you're plugged into?

Can you describe your system in more detail?

What Graphics card are you using?

It's been my experience that the LCD TV's will attempt to reproduce video that is beyond their range. It will either appear much smaller than your viewing area or much larger than your screen. The borders are all messed up, but you can still see something until the adjustments are correct.