Hi there,
It seems like you may be hitting this bug;
When 8832 phones downgrade from 12-0-1SR3-1 to 12-0-1-12 phone does not boot
CSCvj33740
Symptom:
phone never gets IP and it never registered to call manager/the screen is blank.
Conditions:
Here is the steps to recreate:
1. The European version of 8832 phone open box has 12.0(1)SR3 as installed/default load.
2. User has installed latest device pack(available now on CCO ) on the call manager to support 8832 phone.
3. This device pack has 12.0(1) as the default load for 8832 phones.
4. Now when the phone is registered to the call manager, phone downgraded to 12.0(1).
Perhaps it's time to open a TAC case.
Cheers!
Rob