sound wires on HP laptop Help and advice on software, hardware, configuration and general computing issues and problems

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Does anyone know how to take apart a HP laptop to sort out a loose wire? I have an issue with sound on my laptop - i think it's a loose wire that causes the sound to decrease in volume. It starts really loud then goes quiet. I think it could be related to the speaker wires which may be loose (I dropped laptop which may have caused this........many thanks