Can't access to SSH and GUI after upgrade F5 Big-IP i4600 from image 14.1.0.3 to 14.1.2.6

Hi all,   we are having the issue is when we upgrade F5 Big-IP i4600 from image 14.1.0.3 to 14.1.2.6, we can't access to SSH and GUI for management. We connected to F5 by console cable but we can...