Hiya hoping this is just a setting issue.
Just bought some used Avalon 741 units from cryptouniverse.

And when I say used I should say abused.
Two of them have big dents and casing not fitting correctly anymore and one of them hashes ok but fan is running at max even when temps are low and even when not hashing.
They where all full of dust and insects and smell like they where run in a chip shop.
Anyhow i have swapped fan from a known good unit so looking for suggestions what to do next.

cheers Geronimoe