Last night, I watched a DVD with our DVD player. ( I think it's a HDT Karaoke and DVD Player Premier 98i) It's also a karaoke player of my mother's. Just a whie ago, I tried to open it but the moment I opened it, the player still displays "Loading.." on its screen but the cd slot comes out suddenly. I pressed Open on the remote and the display on the DVD player only changed to "Open". I tried pressing it once more and it closed. But seconds later, it goes out again.

Last night, while I was watching, the sound wasn't synchronized with the display on the TV. The images appeared later than the sound... What should I do...?