Camera works fine until i plug it into the printer, at that moment the LCD screen goes off and wont come on again so i can't print any pictures

How about DPOF (digital print order format)? Usually that is configured prior to connecting to the printer. I have never owned or used a Kodak in my life but this is an option you can check.

Please tell us what camera and what printer so we can help.

That is completely normal, as soon as you hook up usb cord, the camera screen will be blank. It will function just fine and normal.

Nope, Kodak is only for Kodak cameras.

This problem is frequently due to corroded battery terminals inside the camera. Remove the batteries and wipe the terminals with a soft cloth (heavy corrosion may require a fine wire brush, steel wool, or sandpaper). Remove any residue left in the camera by the cleaning. Clean the terminals on the batteries in the same manner, and then replace them in the camera. This cures most problems, but if it doesn't work for you, check the Kodak troubleshooting guide at:

http://www.kodak.com/global/en/service/repair/troubleshooting/troubleshooting.jhtml?pq-path=6198

It uses a simple Q&A format to diagnose problems and propose solutions.

hi...ensure that the camera is turned on. If applicable, ensure the lens cover has been removed before taking pictures. the LCD backlight is turned on by pressing the DISPLAY button several times until the screen appears. Depending on the camera model, the DISPLAY button may be labeled as DISP or with a display icon. This button could be a standalone button or it depends upon the camera model.....
If operating the camera with a battery, ensure the battery is fully charged.
Ensure the battery is inserted properly in the camera.
If operating the camera with the power adapter, ensure it is plugged into a working AC outlet.
Ensure no Audio/Video (A/V) cables are connected for viewing pictures on a TV; the LCD screen will not display when an A/V cable is connected.
Perform a reset procedure on the camera....

The camera is supposed to go blank when connected to computer.

I hit the "share" button and can then download photos, even though screen is still blank.

Color lines in the LCD display is caused by certain type of light connections. If you get all the time when you turn on the camera then the LCD panel is bad, would need to be replaced. Black lines in printed printed pictures from your printer or the Kodak dock station printer? If that's the case, then the transfer rollers are dirty and would need to checked or replaced. Also drivers could do this also. Report the problem to Kodak Live Chat Online Tech Rep or called on the LAN line (phone).

CCD failure most likely. Format the card then try again or a new card. Kodak customer support for more info

The camera may have shut off automatically to save power. Press the POWER button to turn it back on. Also make sure the mode dial is turned completely to the desired mode. When the camera is connected to a computer, the LCD screen is disabled. When it is connected to a printer, press any button to display the print progress screen. After a moment, it disappears again.