Just to let you know I just did an upgrade from 4500s and had the exact same problem. Luckily, I found this thread, but could I suggest a few changes...
Do you get the thirty second countdown when you shut off the master at the end of the flight and do the EFIS displays stay alive for the full thirty...
Hi - N413BS has a touch 5600 (left), touch 5500 (center), and nontouch 5600 (right). On May 4, I flew KTMB to KTPF and then a return flight to KTMB....