click wheel change but still not working

You can try to accomplish anyone of those two steps below, but it might be difficult if your click wheel is not responding. Double check your connections and make sure that your wheel is properly connected and that the clip that holds the cable in the connector is closed. Not knowing why you replace the wheel makes it a little bit more difficult to determine the actual cause. If you have a new wheel, as well as all connections are made, and you can not restore or reset I would think that the error is on your logic board.To reset an iPod Fifth Generation (iPod Video):

1. Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)

2. Press and hold the Menu and Select buttons until the Apple logo appears, about 6 to 10 seconds. You may need to repeat this step.

http://www.reset-ipod.com/reset-ipod-vid...

How to restore your Fifth Generation iPod (iPod with video)

1. Make sure you’ve installed the latest version of iTunes.

2. Open iTunes, and then connect your iPod to your computer.

3. After a few moments, it will appear in the Source pane in iTunes.

4. Select your iPod in the Source pane and you will see information about it appear in the Summary tab of the main iTunes window.

5. Click the Restore button. A window will appear asking "Are you sure you want to restore the iPod "iPod" to its factory settings? All of your songs and other data will be erased."

6. Click Restore again. (If you're on a Mac, you'll then need to type in your password.)

7. During stage 1 of the restore, a progress bar will appear on the computer screen indicating that the first stage of the restore process has started. When this stage is completed, iTunes will instruct you to leave iPod connected to your computer to complete restore.

8. During the stage 2 of the restore process, the iPod will show an Apple logo as well as a progress bar at the bottom of the display. It is critical that the iPod remains connected to the computer or iPod Power adapter during this stage. Note: The progress bar may be difficult to see since the backlight on the iPod display may be off.

9. After stage 2 of the restore process is complete and the iPod is connected to the computer, the iTunes Setup Assistant window will appear asking you to name your iPod and choose your syncing preferences similar to when you connected your iPod for the first time.http://support.apple.com/kb/HT2613?viewl...