On my TV certain shows (Craig Furgerson, Oprah, The View)on different networks,a black rectangle, about 1/3 of the picture, appears. I cannot remove it.

I do know that on Zenith CRT televisions of the 1990's this will happen and all I did to fix it is to go to the menu and turn the text feature off. This may be true with your Sharp as well.

Insert a movie and play it automatically
In PowerPoint 2003, you can run your movies full screen. This is a very excellent feature.

• On the Insert menu, point to Movies and Sounds, and then click Movie from File.
• Click the video you want to use and then click OK.
• Tips: Always put the movie in the same folder as your PowerPoint presentation. If you later move the PowerPoint presentation to another computer, copy the movie too. Keeping your movie in the same folder as your presentation ensures the link will still work. However, you should always test the movie on a new machine just to be certain. Re-insert the movie, if necessary.
• After you click OK, you' are promoted with a message asking how you want the movie to start in the slide show.



I recommend choosing Automatically even if you want the movie to play when clicked- I will talk about how to set this part too. (If you choose when clicked you have to click the black box to start the movie. Because I don't like to show the black box on the slide, I do this a little differently.)


• You should now have a small rectangle sitting on your slide.
  
  
  
• Insert a movie using a file on your computer or in another location, such as a server.
• The movie appears as a still frame on your slide.
The trick I use is to move that rectangle off the slide, so it is sitting next to it, but not on it. You can size it down if you like. Click the movie (that is, the rectangle) and then drag it off the slide.


Play the movie full screen

• Right-click the movie object (the small rectangle) and on the shortcut menu, click Edit Movie Object.
• The Movie Options dialog box appears. Under Display Options, select the Zoom to full screen check box, and then click OK.
  
• If you want your movie to play automatically when you advance to this slide, you can stop here.

Test this now to see how it workd by starting the slide show. (On the Slide Show menu, click View Show.) Advance to the slide with the movie, (best if you have the title of the movie on it). Within a couple of seconds, the movie starts to play full screen. When the movie finishes, you return to the same slide (but no unsightly box appears). Click to advance to your next slide.

Add an On Click effect to start the movie
If you prefer, you can click to start the movie. This requires one more step, setting an On Click animation effect.
1. On the Slide Show menu, click Custom Animation. The Custom Animation task pane appears on the right side of the PowerPoint window.

2. Click the movie object (the rectangle) to select it.

3. In the Custom Animation task pane, click Add Effect, point to Entrance and then click Appear.

You have added an On Click effect. The animation effect you added is the one with the Green star next to it and a gray rectangle around it. If it doesn't have a gray rectangle, click it to select it. Your Custom Animation task pane should look like the picture below (except with the name of your movie in the list).


4. The last step is to move that animation up to the top of the effects list.
To do this, make sure the animation effect is selected, and then click the Up Re-order arrow at the bottom of the Custom Animation task pane. Or simply click and drag the animation effect to the top of the effects list.

5. Your effects list should now look like this:


6. You are done. Test this to make sure it works by starting the slide show.
(On the Slide Show menu, click View Show.) When you advance to the slide with the movie, you should not see the movie. When you click the slide, the movie zooms to full screen and plays. When it finishes playing, you are returned to the same slide. Click to advance to the next slide.


Souce: How to insert a Movie (or video) into PowerPoint 2003?

that would be you PIP (picture in picture) just press the PIP til it goes away

PIP is on (Picture in Picture) either from your cable box or the TV. Check your remotes for "PIP". If you still have an issue, post a comment and I can help you more

That is the PIP (picture in picture) setting, on the TV's remote control. locate the button marked PIP and press the button, it should clear the little box.

Note that the large black box goes away when pushing buttons on the tv (ex: the black box will disappear to show the volume setting when changing the volume on the tv but it will cover the picture and the menu display of the dtv box).

This is caused by the closed caption setting of the television set NOT the captioning of the converter box. To fix this you must open your television's menu, find the ccd/closed caption option, and turn it off. This is a frustrating problem as when most people are told to shut off the captioning they try to do so at the box.

Normal dtv box captioning will appear as a small text box at the bottom of the screen as you would expect - not as a giant black rectangle that covers most of the screen. If you do want to shut this off too you will find that you can't do it through the usual menu options (the menu will only allow changes to font, color etc.) - there should be a ccd button on the remote that when pushed will scroll through ccd-1, ccd-2,... off.

Try pressing the "View" button on the remote control a couple times -- it sounds like you have the picture-in-picture mode turned on but with nothing showing on the second input.

A square box imposed on top of pix is called a text box.
It is controlled thru the Closed- Caption menu selection.
Enter CC menu and make different selections-try them all,it will help you to understand.....,..T.

Good for you!! CONGRADULATIONS

Perhaps the caption is on?