How can I hook my 754n to my TV [s-video or HDMI capable]. This PC has no TV out, not sure about VGA.
Desktops are not nearly as problematic as laptops in this area, so you are in luck.
Depending on your video card, and if you don't have an up to date card, it would pay you in the quality of your video output to obtain one, there should be outputs on the card.
There would be no TV out (composite video) unless you have either a tuner card or a high quality maxed memory card.
Rather than recommending a specific card, which depends upon your particular configuration of clock speed of your cpu and how much memory you want to share with your video, I will recommend a class of cards that might help you, and a particular manufacturer or two.
The ATI cards have been superseded in my esteem by Radeon, though either is a good bet.
One card that will do you good is the Radeon HD 3870 with a half a Gig of DDR2 memory, so that your system memory doesn't have to do the whole graphics job. PCI Express 2.0 and the AGP version has DVI and TV out, and has Dual Lin Dual DVI HDTV connectivity HDMi support along with VGA and Blu-Ray and HD DVD support and just happens to be the cheapest of the cards, currently listed in Tiger Direct's catalog [LCB] for only 49.95