screen message is "can't read a" or can't read u" - how do I fix this?

my cd freezers on first track?

how can I check remote for Grundig MDC65 minidisc/cd?

How can I fix a sony walkman cd/mp3 player?

error 40 is all my old sony mz-r3 md recorder displays?

sony minidisc deck mds303 keeps ejecting?

Read error C13 on Sony Minidisk player/recorder?

Sony personal minidisc system ZS-M7?

The sound is distorted ?

i can not eject my mini disc . ?

can i record?

Sony mds-s50?

won't turn on?