T.V. Back
Start off by creating a new layer in photoshop. Select a rectangular shape with the rectangular marquee tool.Then fill the shape with light grey. I used 15% grey or RGB 218 218 218. This will serve as the base for your TV screen. Now rightclcik on the layer and choose blending options and use the following settings for Bevel and Inner Shadow.(images open in popups)
T.V. Screen
Create a new layer. Then once again using the rectangular marquee tool create a smaller screen on the page and fill it with a dark blue or black color. Right click on the layer choose blending options and use the following settings (images open in popups)
Display
Now create a new layer for some text, image, whatever you want the screen to display. Then change the blending mode of the layer to either soft light or hard light (depending on what works best for you).
Glass Effect
Then create another new layer on top of all the other layers and draw an oval selection with the middle of the selection going right across the top of the TV screen.
Then using the rectangular marquee tool with its mode set to subract from selection 
, select the top half of the selection to delete it. Finally fill the remaining selection with a gradient going from white to transparent.
3D -ish
- Link all of the layers together (click the little square beside the eye in the layers panel)
- Then press Ctrl+T or goto Edit Free transform to rotate and scale the images, then right click the image and use the skew and prespective to give the images a 3d look.
- To give the image a sense of depth duplicate the back layer which forms the silver frame, and then move the copied layer below the original and press ctrl+t to bring up free transform, and then increase the size of the image on this layer. Also you may want to add a drop shadow to lift the image off the canvas.
Final Image
Finally you may want to add some wires or mechanical contrapitons to hold the TV.
Incidentally the background for this was created using the Photoshop wood grain texture tutorial
