02 Suburban TEMP/COMPASS issues

I have an 02 Suburban and all of a sudden the other day the display on the rear view mirror went blank. The electrochromic part still works, but the temp and compass do not. Does any one know if there is a seperate fuse for these features or what else i may check?

I had problems on my 99 burb with the auto dim feature.I don't know if the same system is on an 02,but is there a small green LED that is illuminated for the auto dim?I believe that if the auto dim is functioning,then the system is getting power.Do you have an owners manual?The compass/temp button should allow you to toggle between the different features.I don't know if I was much help,but first check the owners manual on how to activate the system.

Chuck's