LG LM-D2540A Manual page 11

Specific FUNCTION MODE has no sound
AUX FUNCTION SPEAKER output
YES
IC700 output check(Front -L/R)
YES
Output sound Troubleshooting refer
IC601 PIN5, 24 input check(AUX -L/R)
OK
TAPE FUNCTION SPEAKER output
NO
YES
IC602 PIN2, 9 input check (FRONT -L/R)
IC602 replacement
OK
NO
IC700 input check (Front -L/R)
YES
NO
IC700 replacement
NO
YES
NO
IC601 replacement
YES NO
IC601 PIN4, 25 input check (IN -L/R)
IC602 PIN2, 19 input check
(FRONT -L/R)
YES NO
IC601 PIN5, 24 input check(IN-L/R)
IC602 replacement
JK600 AUX input signal cable or
external component sound output check
NO
YES
IC605 PIN4, 11 input check
YES
IC601 replacement
- 2-6 -
YES
IC601 replacement
IC202 PIN5, 20 output check(TAPE -L/R)
IC605 replacement