Mike,
there are a few options you can try here. Its a good sign you can navigate through the screens. The directory broken alarm is definitely referring to the program storage part. FMC board is likely the cause, especially due to the watchdog alarm. If it comes down to that there is a procedure you must follow to properly swap to a new / repaired board, but we will cross that bridge when we get there. There is a way to reformat the directory, but with all the other alarms I doubt that will get you any farther. Its (mostly) safe to say your FMC board is on the way out. Do what you can to make backups of everything. The HPC1 and GMI board are the ones that have the memory storage, but you can never be too sure that it might get worse so make backups before you do anything! Do this and get back to us.
John