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Question:

Speaker problem: speaker plays sound but wont turn on?

I got a set of speakers that also work using batteries for my mp3 playeri can play music and adjust the volume using my mp3 but the speaker wont turn on so i cant use the controls on the speaker itself the red led on it wont turn on and the volume knob does nothing and neither do the bass and treble buttons yet if i connect my mp3 while the speakers are on dc 6v i can hear the music but i cant adjust it because the speaker wont turn onidk how old they are but i bought them second hand i opened it up and used compressed air and everything yet it wont worki haven't tried using batteries yet but i used a dc plug that fit and had adjustable voltage so i set it to 6 like it says on the speakerwhat could be wrong?

Answer:

your sound card drivers are transforming into corrupted, you will ought to reinstell them, you ought to have have been given a disc with the laptop called drivers and utilities or comparable, insert this and set up the drivers or bypass to the manufacturers information superhighway website and get them there under downloads
Try reversing the polarity of the speaker wires. If that doesn't change anything buy new speakers. There may be a problem on the volume control in the speakers themselves.
The speaker is play music using the power output from your mp3 player, when external power is connected it is amplified at Least this is what I think, would help to know a bit more about the kind of speakers. So sounds to me that your external power isn't reaching the speakers, could be anything from faulty wiring to a crack in a circuit board. Sorry I couldn't be more help and hope you work it out

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