Many modern televisions have D-SUB connectors; if you have a desktop that is near your TV, you can also get a second video card and simply connect it to your TV

Many modern televisions have D-SUB connectors; if you have a desktop that is near your TV, you can also get a second video card and simply connect it to your TV like any other monitor. Even if you only have DVI-out, you can convert losslessly from DVI to D-SUB with an inexpensive adapter.