I have 2 switches X460 in stack.
Slot 1 - priority 90
Slot 2 - priority 70
Soft 126.96.36.199 p1-5
After reboot slot 1, slot 2 became Master, slot 1 role NONE and MGMT LED is blincking amber.
In log I see messages like
Failed to send SNTP request to server
POST go normal (see this through console)
Diagnostic pass normal.