ER-301 encoder and button issues

Hi,
Apologies for the “1st time poster having problems” post, but after some searching I hadn’t seen a fresh post on the topic.

My er-301 had been out of my rack for a few months and upon re-racking I’m noticing that the device isn’t registering any input from the encoder or channel select buttons 1 or 2. I’m guessing these aren’t related, but was curious if there was any advice on what could be the issue / diagnostics I could test.

thanks!

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