After a move, I have been reconstructing my audio system, which has as its core a McIntosh preamp/AM-FM tuner and the MC300 power amplifier. Having gotten some new speaker cable, I attempted to reinstall this item, but one of the screws on the back fell off and *will not* go back in. I cannot now attach the cables and cannot use this instrument. Any help appreciated! --E.A.C.
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