Qnx is a proper realtime OS designed to run much more complex systems than the
ICC is so i have to assume it has proper timeouts etc but more likely asked to halt/shutdown the whole system if it cannot init one or more components. Recovering the content of the flash memory from the failed panel could answer some questions again assuming it contains system logs etc on a standard qnx filesystem.
This whole thread is really exciting, thank you for the great work and documentation @JasonACT
Sent from my Note7 FE - Flames Extinguished edition