Welcome to Android Central! Since is a very old thread in the original Galaxy Nexus forum, it might be better to create a new thread with your question. But in the meantime, see if the problem occurs in Safe Mode. On most Android devices, while powered on, press and hold Power until the Power Off menu appears. Press and hold the Power Off selection until the Safe Mode prompt appears. Tap OK.
If the problem disappears in Safe Mode, then something you installed is causing the problem. You may have to uninstall apps one by one until the problem disappears. If the problem persists in Safe Mode, then it's more likely to be a hardware or firmware problem.