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Takes a while to turn on

When I turn on the amp, all the lights come on but no sound, and it seems that the only way to get to produce sound is to pluck the strings on the bass very hard and then it starts playing right away. I was thinking that there was a warm up time on the amp but the times between powering on and sound coming out is not consistant. anyone else have this problem, and yes I have tried it out on different basses.

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SOURCE: Last weekend while I was playing, I smelled that

They are NOT called motherboards, just circuit boards.

Sometimes the board can be restored by carving out the black and re-insulating it and repairing the cause and bad components.

Likely the power transistors have shorted that are associated with that side and burned compnents.

Many shops will only replace the whole board rather than do the labor to restore the board... Yes, either way it will be expensive to repair.

Causes of these failures can be overdriving the amp. bad speakers and or cables. Loose speaker connectors that vibrate can lead to this.

Another problem can be if SUPERSONIC (can't hear it) feedback is occuring at high frequencies that overloads the amp.

Posted on Aug 09, 2010

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