The How-To Geek has an article on 6 potential problems and how to fix them.
1. Bad Performance After Upgrading to Android 4.2
2. Touchscreen Responsiveness Problems
3. Tablet Won’t Power On or Charge
4. Screen Separation
5. Screen Flicker
6. Washed Out Colors After Watching a Video
I haven't had any of these problems myself, so I can't verify if they work or not. I do know that How-To Geek is a reliable website. You can click here to read the article.