Sir, Ano po ang brand and model nang DVD player mo? I used to have a nextbase DVD player, When I insert a disc na walang gasgas, and view the movie, later nag-skip na sya and pag na eject nang yung DVD, may circular na gasgas na yung DVD, from then on, di na ko bumili nang mga generic na DVD players
Pag may perfectly circular na gasgas sa disc, may internal part na sumayad sa disc while the disc was spinning.
Siguro sumayad ang pickup assembly, wala sa alignment. Minsan may dumi, umipit between the lens and the disc while the disc is spinning, causing a perfectly circular scratch.