Casio PX-780 - Speaker, Card, and LED Issues

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4-11. Speaker NG
Check the connection
of CN11.
After replacing the
Speaker, check again.
FFC is defective.
Connector is loosely
connected.
MAIN PCB is defective.
Speaker is defective.
OK
Yes
NG
No
OK
NG
FFC
damaged?
4-12. PCMCIA Card NG
4-13. SD Card NG
4-14. Charge LED NG
Check the connection
of CN11.
Replace the PW PCB
and check again.
FFC is defective.
Connector is loosely
connected.
MAIN PCB is defective.
PW PCB is defective.
OK
Yes
NG
No
OK
NG
FFC
damaged?
ReplacetheMAINPCBandcheckagain.
ReplacetheMAINPCBandcheckagain.