MY (FECKIN) SONY MINIDISC MZ-N710 IS HAVING NUMEROUS PROBLEMS... THE MAIN 2 ARE: 1) SOME OF THE MINIDISCS I TRY TO PLAY SAY "READ ERROR" ON THE SCREEN... I HAVE HEARD THERE IS A BUTTON COMBO TO ERASE THEM (but fecken sony wont tell me it n refer me to the instructions which i tell them do NOT work) CAN ANYONE ELSE HELP ME OUT? 2) i MAAAAAAY HAVE ENTERED THE HACK/SERVICE MENU (by mistake, of course... ) AND DISABLED ALL USE OF MY VOLUME CONTROLS AND SOUND SETTINGS (standard, surround, custom etc). IS THERE ANY WAY OF FIXING THIS (vol +/- dont work at all, not even in menu) OR AT LEAST SETTING MY MD BACK TO ITS DEFAULT FACTORY SETTINGS? p.s you guessed it... sony wont tell me that either...