Not sure if this is the right place but I saw this today and have seen it before. My radio still works, just can't see any of the normal information besides that "H" and the triangles. Anyone know what this is? Sorry the picture is so blurry.
Ok I wasn't sure how to search but I found a related thread after searching "prius radio h". Didn't look like anyone knew what was actually going on in that thread either.
Without a much better picture, my first guess is the LCD display is going bad. Since the letter H is readable, and I am assuming H is indeed the first letter in whatever the display is reading, that would rule out the LCD Driver, and Data Display chip! Need a better pic...