Damaged Screen My screen is damaged, camera still works but cant preview the pictures and see the menu options or change settings need to replace the screen need the links for a service places or parts for it any advice or suggestions please help.

This sounds like the screen is damaged. When you are taking the photo, can you see the image clearly. If not, the screen is damaged and you need to replace the screen.
If you can, however, see the image clearly, then check that your settings aren't putting on any effects

its not inconcievable that the new screen is faulty, I have had this problem with 2 LCD screens out of only 5 purchaced!

I think you did something wrong while replacing the screen. It might look easy to replace a digital screen, but you should have the right skills to do so. The connections of a screen to a camera are very delicate and very small. just a bit to far to the left, right, front or back, could cause serious trouble, in not working or not correct working of the screen. Or worse permanent damage of the screen. I would try to go to a phone repair shop, because most of the repair guys there, know how to connect a screen. I hope they will help you and the screen or its cables are not damaged.

I hope you did not drop the camera. The display can be damaged and it will hinder you. But it looks you still can make good pictures, so the camera part works.
If you want to screen to be normal again, I think you should visit a repairstore or your dealer.

Seeing the Date When Previewing images

• The camera records the date and time of each photo in the metadata attached to each picture. You have the option to see the date and time when when the camera is in "Playback" mode, which allows you to preview your images on the screen. When looking at your pictures, use the "Disp/Back" button to include text with your pictures. The date and time will appear along the bottom of the image.
  
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Printing the Date on Pictures

• Users can include the time and date on their prints from the "Mode" menu by choosing "Print Order" with the "With Date" option.
  

Make sure Image Review is set in Custom Settings. See page 90 of the manual: http://www.fixya.com/support/p418-nikon_d50_digital_camera_with_18_55mm/usermanual-D690EED-pdf

Usually the photo is displayed for a short period of time. Try the setup in the menu. There should be an option for previewing recent pictures.

Hello
If you can see menu on-screen display, just get into it, surf for blue-back option and turn it OFF first, and see whether there is any grains appears on your screen. If there is no grains, and only a plane raster, your TVs video processor Ic has got damaged, and should need replacement. If there is grains, you just retune it in autotuning option, and allow it to store all the transmitting signals at that time. This process may take two or three minutes to complete, and you should wait till then. Never forget to connect antenna socket to the antenna terminal of your tv.
If you are using set top box, and connected it to the TV through audio-video cable, your TV has no fault, but the set top boxs' video processor has got damaged. OK,

If you have given the correct information, this camera needs repair.
You don't have many options. Repair, or sell the camera on a site such as Ebay for parts, as is or repair parts.

If the camera has been damaged by either impact, or water exposure, it is possible that the internal parts have damage repair cost which can be more than you want to pay since this camera is a few years old.

If there has been no damage, then some internal cable may have come loose or broken. Some times this can happen from normal use.
That some components may have failed is also a posiblity.

Has the screen been cracked/damaged? Was your camera dropped in any liquid? It's worth it to try having the LCD screen replaced, as it's quite affordable. If there is liquid damage near the LCD input inside the camera that would be another issue that would be solved by replacing those main boards.

In an ideal situation it would be just that the backlight cable wiggled itself out of its input (I'm assuming the screen doesn't light up anymore), which is something you could look at yourself if you're comfortable taking your camera apart. I wish you luck =)