You can leave the PC hooked up to it, the LCD should have couple inputs, all you to do is switch between inputs with the remote.
LCD input (TV) I don't know how many inputs this monitor has if you can check and post the model or a link to the TV it would help, let's just say you have all these inputs below:
- Let's say you have a cable box and you use the S-Video output from the box to connect to the S-Video input on the TV. To watch regular cable TV you have to switch to input #1 to watch cable TV.
- Now assuming your computer has a DVI output, you would connect that output to the DVI input on the monitor, and to display your computer you would have to switch to intput #4 which is your DVI.
This is just an example, it could be different for your TV.