I'm editing a program that has been in operation on my Rockwell Automation Mico850. The unit faulted while (re)downloading the program via ethernet. The fault is of the non-recoverable type, meaning the procedure to clear it is a power-down restart. This is not clearing the error even after isolating the unit from all i/o and the terminal. The fault appears immediately on applying power. Is this unit destined for the junk pile, or there a trick to getting inside?