The sleep/wake button is not working fine on my brand new Nexus 10 with Android 4.2 OS. The tablet goes into sleep after I press the sleep button. Then I press the button again to wake it up, the device just shows Google logo and then brings up the power off menu. These issues happen while I plug it into wall charger or not. However, if I connect to PC computer, the sleep/wake works as normal. How to get back the normal function?
It certainly is a hardware issues and the contact switch is worn out on your device. A number of people get tons of problems with the button. To solve the problem, you need to open up the tablet, clean out dust and dirt, and then re-seat the button. But that will void your warranty. You'd better exchange with new nexus.