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GK MB500 head

Discussion in 'Amps and Cabs [BG]' started by 4stringwannabe, Dec 26, 2013.

  1. 4stringwannabe


    Jun 3, 2012
    My GK head all of a sudden is non responsive. It won't power up..all of the obvious things have been checked..it has power, speakon adapter/speaker cable and cab are fine. The manual says is has a "self protecting" shoutdown feature when something is wired incorrectly. It's like it won't reset. the power light did flicker red for a second while powering on and then nothing...not sure how to proceed..unit is practically new and never left the basement..used it 2 days ago without problems at home volume...hmmmmmm anybody out there have any suggestions?
  2. ::::BASSIST::::

    ::::BASSIST:::: Progress Not Perfection.

    Sep 2, 2004
    Vancouver, BC Canada
    Sometimes brand new amps fail. Its just the nature of the beast of technology. Exchange it and be happy.
  3. Icculus

    Icculus Supporting Member

    Jul 29, 2010
    Brotherly Love
    Contact GK customer service. They are great to deal with. Unfortunately, I think they don't reopen until after New Years.
  4. NWB


    Apr 30, 2008
    Kirkland, WA
    You might try reseating the power plug into the amp and the wall socket. Sometimes that will work loose a bit.
  5. Try firing it up with NO speakers connected (or cables).

    If it comes on, your adapter and/or speaker cable is shorting.
  6. GK Growl

    GK Growl

    Dec 31, 2011
    This has scared me several times. Intermittent power or no power at all. It's the first thing I do before every power up now.
  7. +2. Yep