Map button no longer shows anything - other menus work fine

So all of a sudden my navigation stopped showing on the screen, even though my climate control, mpg page, etc work fine and touch screen work fine. Sometimes the map page willl show a blank screen with lots of vertical white lines. Any ideas how to fix or start fixing this? Randomly the nav will work in rare cases for short periods of times.

 

Alright so menu , destination, and the map buttons all show a blank screen when pressed.I disconnected, looked at, and replugged in the plus under the seat that go into the dvd nav box, and they were all tight and fine. So it seems to be something else.

Any other ideas possibly? Thanks

 

No I haven't... I will be swapping it with a working mfd once I pick one up in a week to see if it's that unit itself, or if it's an accessory, I'll update the thread when I find out.

 

I ended up swapping it out for a working MFD, and the problem was fixed. It's one of the internal chips that cause this. Basically go on ebay or better yet priuschat classifieds and look for a replacement that works. Note the specific part number does require you to pull your mfd out, but to do so shouldn't take more then 20 minutes.