You might try buying a can of circuit board cleaner and spraying the inside of the receiver. I do this every two years or so to get rid of built up dust/dirt that can accumulate if the receiver is in a cabinet.
Hi folks,
Good news on power supply unit for ESL speaker. Bought a pair brand new in early Oct. 2021. All was good up till late Nov. Suddenly…top panel on one speaker went silent. Did all the checks to confirm it was the power supply unit. E mailed Ron at Martin Logan Support who agreed with my...