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My laptop M-6312 is not turning on. No lights, no sounds, except for quiet whistling from speakers when AC is connected.

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Rem,ove your battery and connect the ac adaptor again then let us know if you can boot up-if so your battery is suspect and should be replaced.If the problem is the same the pwr circuitry on the mainboard has blown and the mainboard will have to be replaced.You should also try another adaptor if you can get hold of one, to rule out a faulty adaptor.,

Posted on Jul 31, 2008

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Posted on Jan 02, 2017

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