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I had a set of computer speakers (Altec Lansing BX3). My wife plugged a heater into the surge protector and later yanked the heater plug out before turning it off. Computer went into some freaky cousin of a BSOD and computer speakers started acting up. Speakers were three parts: two smaller stereo speakers that wired into the back of the base with bare wire connections. The stereo speakers were fine, but the bass started making a loud humming/buzzing noise. The noise was not affected by turning the volume up or down, however it would go up and down in volume if I dialed the bass. Is there anything I can do to fix it? I opened up the back but I don't know enough about electronics to tell if something is broken. I was hoping there would be a fuse I could just replace, but I haven't found one.

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Maybe the capacitor in the power supply burned upon unplugging the heater. The power supply is a coil with iron core, next to it, there should be a rectifier and a capacitor. If the capacitor is burnt, the powersupply will still be working, but there will be noise on the line, the 50 Hz that comes out of your wall outlet. Capacitor of the same value can be bought for small change but has to be soldered in.

Posted on Feb 13, 2011

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