Hardware Problems in PA 3220

[DGonzalezAR]

I had similar problems in 4 firewall pa 3220 in which I could not even enter maintenance mode to take it to the factory reset mode and I had to send them via RMA to the 4 firewalls  for their change. Someone had a similar problem ,  to me a lot of attention that firewalls  with very good MTBF  have this type of problem if someone knows something, I will appreciate it.

[nbutter]

Were you trying to get in on serial console?  If so, did you try different speeds?  I've seen devices where someone has modified the bps and it looks like a dead device.