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Use of a Variac to slowly power up equipment

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    Use of a Variac to slowly power up equipment

    Hi all,

    I have an old Apple II monitor to restore and I do have a big variac. I've always wondered whether a variac is a good idea to power on equipment which has been unpowered for (likely) decades?

    When it comes to analogue stuff, I suppose it's ok and I'm probably going to see the device slowly coming back to life with a lower voltage applied.

    But I suppose this won't work for devices with digital components in it as they won't work unless the proper voltages are applied?

    In case of an old monitor, it is safe/good for the monitor to run it at a lower voltage for a while (say 100V out of the rated 240V)? Would that be better for the capacitors? What happens to high voltage, will it happen, just at a lower voltage?

    Thanks!
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