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Only for training and service purposes
5. In case of no sound
(1) Symptom
1) LED
is
blue.
2) Screen display but sound is not output
(2) Check follow
All input(mode)
is no sound?
No
Is VCC “+16V or +20V”
Normal?(JP1 : 1pin)
Yes
No
Replace Power Board.
Yes
Is the speaker Cable
normal?
No
Check the Speaker
Cable
Only HDMI is
no sound?
Download
the EDID data.
No
No
Only DTV is
no sound?
No
Yes
Check the Tuner In/Out
Yes
Only AV/component/PC
input is no sound?
No
Check the input source.
Yes
Replace Main Board.
Содержание 42LF7700
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