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GK MB200 taking long to power on

Discussion in 'Amps and Cabs [BG]' started by cheapimitation, Dec 23, 2014.

  1. Dec 23, 2014 #1
    cheapimitation

    cheapimitation

    Mar 23, 2007
    Hi -- my MB200 suddenly started taking about a minute to power on, if not on for a few hours. If it is powered on, shut down, and then powered on again, it starts right up, but if left off overnight it takes 40 to 60 seconds for the LED to come on and amp to function. This situation has been consistent for a few weeks, and observed at multiple sources of AC. Any insight?
     
  2. Dec 23, 2014 #2
    NG51

    NG51

    Aug 19, 2010
    Oakland,CA
    Does it do it on any circuit? I had this problem with mine when I plugged it in at my shop, and it turned out that we had a defective neutral wire in the building electrical circuit.
     
  3. Dec 23, 2014 #3
    cheapimitation

    cheapimitation

    Mar 23, 2007
    Yes, it happens at multiple venues. It's something that can be lived with now, but am wondering if it is a sign of coming failure.
     
  4. Dec 23, 2014 #4
    NG51

    NG51

    Aug 19, 2010
    Oakland,CA
    Downunderwonder likes this.
  5. Dec 23, 2014 #5
    5port

    5port

    Oct 14, 2009
    LI,new yawk
    The MB200 does a few system checks at turn-on. It will look at the speaker impedance, it looks for shorts,etc. I may not like what its seeing at turn-on. The speaker may have changed res. Try a turn-on with no speaker connected and see if it changes.
     
    NG51 likes this.
  6. Dec 24, 2014 #6
    cheapimitation

    cheapimitation

    Mar 23, 2007
    Tried it with no speaker, same problem. Thanks for the suggestion.
     
  7. Dec 24, 2014 #7
    MuthaFunk

    MuthaFunk

    May 8, 2007
    GTA Ontario Canada
    Sounds like a call to GK is in order. The power in those heads is fed from the amp module. Even with the checks it shouldn't take that long. Sounds like something's a miss on the power supply / amp board.