Xiomara Blanco is an associate editor for CNET Reviews. She's a Bay Area native with a knack for tech that makes life easier and more enjoyable. So, don't expect her to review printers anytime soon.

For many Vizio TV owners, a dim or partially dark screen can be a frustrating and puzzling issue. However, in many cases, these problems can be diagnosed and fixed with some basic troubleshooting and ...