I want to show powerpoint slides on a TV screen. I asked at Office Depot, and they suggested buying Dazzle box. I did. I can record from the VCR to the computer, but I still can't transmit from the computer to the TV. What did I miss?

Have you considered simply using a VGA to RCA cable where you plug the VGA into your monitor port and the RCA plugs into your television? Then you simply play the PowerPoint slideshow on your computer and it shows on your TV (Choose Video1, 2, or 3). Then you don't need Dazzle! You can get one at Radio Shack...

Hello, you can burn your presentation to DVD and then show it on TV via DVD player. Here are many ways for you to burn PowerPoint to DVD. 5 ways to burn PowerPoint to DVD

You can compare the cons and pros of these ways and then choose the best way for you.
For my part, the direct way to burn PowerPoint to dvd with Acoolsoft PPT to DVD will be the most proper way if you want to make a professional DVD with DVD menu.

In fact, you can easily view your PowerPoint presentations on TV through a DVD player. All you need to do it to burn your PowerPoint onto a DVD.

Search "PowerPoint to DVD" in google, and you will get lots of advice about how to do it. This tool - Wondershare PPT2DVD is recommended by many people, you can have a try.

Good luck.

Besides Bshiltz excellent information there may also be alternatives depending on your computer / laptop capabilities

I have found a lot of VGA to component lead to be an unreliable method unless they were of a very high quality.

Lots of people are doing this and part depends on what your home theatre has to offer in the way of connections.

For sound most use the LINE OUT on a computer or laptop and connect that to a suitable input on the receiver using a 3.5mm to stereo phono lead.

If you are lucky enough to have an OPTICAL sound out on your computer and one on the home system that would be a better option.

For the video side again it depends on what your computer has to offer

If it has DVI and your TV or home system has DMI then that is the very best option. Remember to lower the resolution on the computer first and to check and of your graphics card options for dual display. A DVI to HDMI lead is needed for that

NVIDIA graphics cards seem to work best in this area.

If you have a VGA connector on your TV that is another great option and you would only need a VGA lead.

Some cards and laptops have S-VIDEO out. Lots of TV's and home systems have these and the display is quite reasonable. If using S-video connections use a GOOD quality cable.

Some people can only obtain a black and white picture so check your graphics card did not come with any special adaptor.

Another method is composite video Even that is not always 100%

Some laptops need a special S-video adaptor which is just a short little cable to properly enable the S-video and convert S-video to composite. That is probably the worst way to do it.

Using a VGA to component lead is also an option but results vary wildly from no picture to quite good. A lot depends on the quality of the lead once again.

I use the optical sound and DMI lead to power a 50" Sony with great sound and picture.

Please refer to this article
Three methods to view PowerPoint on TV