meri reparing ki shop hai

meray pas aik dvd player hai jis ko open karo to agay say locked likha ata hai me us ki sab setimg chek kar chuka hu
us ka model hai dvp-sr520p sony jab b usay open karo to locked likha ata hai
net say kafi search kia hai kafi tarikay diye hua hai lekan is model ka koi nei mila l

meray pas ye same fault aya tha lekan us dvd ka model kuch aur tha net say us ka reset code mila k standbay pay rakh kar return ka buton press kar k enter kar day reset ho gai thi

lekan is par kam nei kar raha kindly koi help ho saky to
i m waiting