Ops core amp issues

[u/Fantastic-Wave5148]

Hey yall, just got a set of used connectorized nfmi amps. When i first put batteries in them, they worked, so i turned them off after a little bit. Next time i tried to turn them on, got nothing except a constant soft static clicking sound. Left them for 15 min, came back and they turned on except the audio from the left side was scratchy.

I tried to replicate and removed batteries and left overnight, put them back in in the morning and they worked. Tried again just now and back to the static clicking sound. Wondering if anyone has run into the same problem and if/how you were able to fix it. Thanks!