We have a remote site with a 5505 that builds a VPN tunnel back to our 5550. The unit failed, and I am on vacation... The network engineer that responded showed up with a brand new ASA5505. He didn't have the config, so he swapped the flash from the failed unit (the unit really failed, it wasn't just the power brick) and put it in the new ASA and it booted, but didn't build a tunnel back to our 5550.
Does anyone know if there's something that needs to happen, like regenerating certificate or something? Is there a reason why swapping flash wouldn't bring this unit up?