Radio/Nav Problems

[jgabler]

Is there anyone in the Salt Lake City area that can help me with my nav/radio problems? I need to see if I can temporarily swap the nav unit out with someone to see if that is the problem. My radio stays on for about 2 minutes and then shuts off. My nav screen has a back light but does not display any info. I just unplugged my nav unit and the radio still only plays for a few minutes. I may need to replace it with a new nav unit but don't want to waist the money if that is not the problem. If someone is in SLC area that can help me out I would appreciate it.
Thanks