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Thread: G4 Fuse blown

  1. #1

    Member Since
    Jun 19, 2007
    G4 Fuse blown
    The fuse has blown in the power supply. Am I able to replace the fuse and get the power supply working again or is the power supply just dead and replacing the fuse will just blow it again?

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    A blown fuse in the power supply usually indicates a short - probably a bad bridge diode or transistor. You can try to replace the fuse with the same type and rating to see what happens. But more than likely, the new fuse will blow immediately. You probably need a new power supply.


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