Sony CDX-M8800 Operating Instructions Manual page 34

If these solutions do not help improve the
situation, consult your nearest Sony dealer.
Messages
Local Seek +/–
The local seek mode is on during automatic
tuning (page 16).
NO AF
There is no alternative frequency for the
current station.
" " or "
You have reached the beginning or the end of
the disc and you cannot go any further.
34
"