My digital camera screen will not turn on

They are all over EBay, just search your camera model number. Here is an example:
http://www.ebay.com/itm/USB-Cable-Cord-Lead-For-Sony-Cybershot-DSC-W40-DSC-W35-DSC-W30-DSC-W17-DSC-W12-s-/130686116159?pt=Camera_Cables_Cords&hash=item1e6d7fe13f

Press MENU to display the menu. Press cursor-right, select Settings (toolbox icon), press cursor-right. Use the cursor pad to select Language ("A" icon) and press * at the center of the cursor pad.

Take a look at this.

1. Ensure the camera is turned on.
2. If applicable, ensure the lens cover has been removed before taking pictures.
3. Ensure the LCD backlight is turned on by pressing the DISPLAY button several times until the screen appears. NOTE: Depending on the camera model, the DISPLAY button may be labeled as DISP or with a display icon [FIG. 1]. This button could be a standalone button or incorporated as one of the control arrow buttons depending on the model of camera.
   
4. If operating the camera with a battery, ensure the battery is fully charged.
5. Ensure the battery is inserted properly in the camera.
6. If operating the camera with the power adapter, ensure it is plugged into a working AC outlet.
7. 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.
8. Perform a reset procedure on the camera.

The troubleshooting steps listed above should resolve your issue. If you have completed all of the steps and the issue is not resolved, service may be required. The Sony Service Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.

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Try to reset the camera to original settings:
How to reset a Cyber-shot® digital still camera back to original factory settings. Solution
Cyber-shot cameras nowadays have a built-in rechargeable battery for retaining time, date, and other settings. Since the built-in rechargeable battery is not removable, current Cyber-shot camera models can only be returned to the original factory settings by pressing a small RESET button on the camera or by using an Initialize option in the menu.
Older-model Cyber-shot cameras (prior to the year 2000) do not have a built-in rechargeable battery and do not have a RESET button or Initialize option in the menu. These cameras require a manual power reset.
IMPORTANT: To determine whether or not your camera has a RESET button or Initialize option, or for other model-specific information to complete any of the steps in this solution, refer to the operating instructions supplied with the product. Manuals are available online in the Manuals/Specs/Warranty section of the Sony® eSupport Web site.
Follow the appropriate procedure below for your camera.
Using an Initialize option in the menu
Since Cyber-shot cameras have different menu system layouts, refer to the instruction manual specific for your camera model.
Using a RESET button

1. Locate the RESET button on the camera.
2. Use a pointed object (like a ballpoint pen) to press and hold the RESET button for 2-3 seconds.
3. After 2-3 seconds has elapsed, release the RESET button.

Performing a manual power reset

1. Turn off the camera.
2. Remove the battery pack.
3. Remove the button-sized lithium battery.
4. Allow the camera to remain without power for 30 seconds.
5. Reinsert the button-sized lithium battery.
6. Reinsert the battery pack.
7. Turn on the camera.

power on to auto lens up and dowen

Sony Camera Website:
http://esupport.sony.com/US/perl/swu-list.pl?mdl=DSCW30

http://www.videolan.org/

You have a bad lens, it prob. also says turn off and on again.

try taking the batteries out

Hello, try to replace the battery (purchase the new NP BG1) If you need more info please advice.