Grrrrrrr!
Blasted power button connector!
So, if you find yourself, moving the speaker over to get to the hard drive screws, pay close attention to the small two-wire connection at the top left corner of the PSU board (if facing the Mac). The small wires run discreetly down the speaker and to the left corner. If they’re not connected securely, pressing the power button will do nothing . . . except make you go mad.
Just you and LED #1. Going nowhere fast.
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