AHRS Hard Failure

[MacCool]

The last 3 flights I've had this message with the attitude indicator frozen. At times it comes back but the failure message does not go away until powering off and on. Anyone had this issue and what could potentially be the cause?

Also, is there another way to reset the system without turning off the battery master?

I saw that screen a couple of times on my 4500, then it changed to "AHRS OFFLINE", and that was all she wrote.