I have had the Nexus S for over 1.5 years and so far I have had a very good experience using it. However, last week my power button stopped working. I tried the solutions mentioned on this post as well as those available on other websites. However, none really worked.
Finally, here is how I solved the problem using apps available on Google Play.
a. I downloaded the switchoff app from Google Play which allows me to switch off the screen without pressing the power button, and I have placed this app on the home screen - so I no longer need the power button to turn off the screen.
b. I downloaded another app from Google Play called MagicLocker which basically overrides the default lock screen. The good part about this app is that when your phone's screen is off, you can use the volume buttons to turn the screen on and reach the MagicLocker lock screen. So now, you don't really need the power button to turn the screen on.
Hope this is of some help to you all.
- Varun Khurana.