Screen turning on automatically
This morning my Galaxy Nexus decided he didn't want to stand by. Every time I locked the screen, it turned on again automatically. Well, after some research it turns out that this can be a software or an hardware problem. Some people resolved the (SW) problem with a factory reset of the device, i haven't tried...
In my case it was a simple HW problem, because i solved it with some simple steps:
- Turn off
- Take out the battery
- Blow with strong inside the power plug
- Take a wooden toothpick and gently clean the plug
- Wait a couple of minutes
- Insert the battery
- Turn on
In a few words it was just dirty...
While doing this, check also the orientation of the male part of the USB connector, it should be coming out straight, it shouldn't bend down or up. If it does, try carefully to bring it to a straight position using the toothpick or a small screwdriver.
If this didn't solved your problem, and you have no fear to open your phone, you could buy a replacement connector board on eBay for something like 10$.
Here you can find some more information:
Phone not charging
Since I'm at it, some time ago I faced another problem related to the power plug that prevented the phone from charging. The male part of the connector was bend down, making it straight (as described before) solved the problem.
GPS not fixing
Another problem I've experienced is the malfunctioning of the GPS receiver, it started all of a sudden, without apparent reason. All the location based application wasn't fixing the signal, the GPS icon would just blink forever.
What I did was simply to turn off the phone, remove the battery, wait some seconds and then turn it on again. Then it started working properly.
Hope this helps, let me know.