em co cay s500.may nay xai binh thuong ,nhu co 1tuan la mat nguon.kep dong thi kim dao dong.fotmat phan mem thi xai binh thuong nhung it hom sau lai bi lai.em da chay lai phan mem,thay flas,cpu nhung van vay.bac nao co cao kien gi ko giup em voi.thank!cac bac truoc nha