Digi 192 Bad Output / 13V DC

We have a rather strange problem at the studio. Three of the outputs on the two 192s have output channels that are bad. When metered they are outputting over 13 V DC, not the nominal 1.228V AC. It is channel 4 on the 8 out and then channel 5 and 4 on the 16 out unit.

Any suggestions how to fix this? They have been sent back to Digi and they said they were fine. They meter as per above with a DVM and pin the Neve's VU meter. Something is definitely not right. They sound band passed and wrong. The Dsub snakes are fine.