06-27-2014, 08:21 AM
When you are in the Tune-Up screen then no you are not able to connect. On one of my Ultras, it would start the tuneup process and then fail. Once it fails then I have access to SSH in for some reason, but unable to do anything at that point. It needs to be able to boot up normal to get serial access or at least get far enough along during the tuneup to enable it.
If you bork the device and can't recover, its easy enough to get a replacement online for cheap with a busted screen you can swap the mobo with
If you bork the device and can't recover, its easy enough to get a replacement online for cheap with a busted screen you can swap the mobo with