I had 4 Avalon 841 in work, when a problem with electricity happened( I believe it came high voltage). 6 PMU boards were burned(3 Avalon 841), the last Avalon 841 didn't had any issue.

I bought 6 new PMU and changed them, neither one of 841 worked(all hashboards were showing code 131073)
I thought maybe the new PMU were broken, so I putted the hashboards to the working 841 one by one and none worked.

Can it be that the electricity problem burned all 6 hashboards at the same time?

Is there any other way to check the hashboard health like measuring the voltage or resistance like in Antminer?

Any help is appreciated.