Haier LE42U6500TF Service Manual page 43

AV No sound but have picture
Check if there is sound input signal
Yes
Check if there is signal at C245 and C247
Yes
Check if there is signal at C607 and C605
Yes
Check if there is signal at LD5,LD7,LD8,LD9
Yes
Check the speakers
Still having problems
No
Check the input source
No
Change U201
No
Check LD3 voltage
Else
LD3
Change Mainboard
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Service Manual
Model No.:
12V
Change UD3