I just got a free Panamax 5500-EX power conditioner that has a loud transformer buzz that starts up about 5 seconds after being plugged in. Is this something that can be easily and inexpensively repaired, or should I put it back where I found it? I've reached out to Panamax and they have no interest in servicing it; I'm waiting to hear back from them as to whether they will provide a schematic, but I'm not coding my breath.
