Hi,
This is where the thread starts:
http://priuschat.com/forums/care-mai...tml#post520213
Hobbit did great work with:
http://techno-fandom.org/~hobbit/cars/mfd/compare.html
It appears the failing solder joint causes the bus that connects multiple systems together can fail inside an MFD. Now that doesn't mean this is your problem. However, it is something to share with the service department.
Do you want to try and fix it yourself? If so, there is more information you'll need to confirm the diagnosis and this involves removing the instrument panel and working with some of the wiring. This is not something for the faint of heart but it is doable.
Bob Wilson