4-22
4. Troubleshooting
4-1-9. No Sound
Symptom
- Video is normal but there is no sound..
Major
checkpoints
- When the speaker connectors are disconnected or damaged.
- When the sound processing part of the Main Board is not functioning.
- Speaker defect.
Diagnostics
MAIN BOARDSMPS BOARD
Does the DC B12VS
appear at CN201 PIN 7,9 - B12VS_PW ?
Does the sound data appear at
PIN - COMP2_SR_IN,COMP2_SL_IN
VIA - PC_DVI_SR_IN, PC_DVI_SL_IN (PC/
DVI)?
Does the sound data appear at
TP - SPK_ L-, SPK_L+, SPK_R-, SPK_R+?
Yes
Yes
Yes
Yes
Input the sound source properly.
Please, Contact Tech support.
Change the Main Assy.
Check CN503, CN402.
Change the Main Assy.
Check IC1111 (X5).
Change the Main Assy.
No
No
No
No
No
Check the source and
check the connection of sound cable
(Comp/AV/PC/DVI to HDMI)?
Replace speaker ?
7
Caution Make sure to disconnect the power before working on the IP board.
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