Insignia IS-TV040923 Service Manual page 21

NO SOUND
Is sound setting appropriate ?
Yes
Is the waveforms at pin
7 and 12 of IC1001?
No
Is the Audio signal input at
pin 23 and pin 24 of IC901?
No
Check J711, J712 and
associated circuit.
TROUBLESHOOTING GUIDE
Yes
Yes
E-5
Check speaker.
Check IC901 and associated circuit .