At a recent gig (UK) I discovered that all of the power sockets in the village hall where we were to play had been replaced since last year with new ones which had integrated power breakers in them: presumably installed for safety reasons. No "normal"/standard wall sockets at all. No problems with our PA or plug-in guitars, but a horribly flat digital piano for me! Somewhere between a semi-tone and whole tone down, so a simple semi-tone transpose would not cure it. I have had this happen very occasionally before, and usually switching off and switching on again cures it: but not this time! After 7 or 8 reboots, just as flat as ever, so out with the handbook, and remind myself how to do a "fine tune" - fortunately my piano has this facility, or it could have been disastrous! On checking the piano at home and playing again since via a more standard 3-pin socket, no problem at all, so I conclude that the power-breaker socket somehow reduced voltage to the piano, causing a malfunction. Anyone else experienced similar? Previous problem when linked to generator power, but it turned out that the generator was only achieving barely 200v, well short of our usual 240.
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