laptop buzzing when plugged into amp

  KevinLiard 02:52 20 May 14

hi i use a a100 equiem laptop to dj and when i plug my phono to mini jack in i get a terrible buzzing noise only eliminated once i uplug my charger i was assured my replacement charger was erm genuine, yes i know probably not but could this be the only reason its doing this and does anyone know where i can get a real for want of the word charger from please help as its doing my head in tried a inline compressor thingy didnt do a thing

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