Haier LE50K6000SF Service Manual page 29

AV No sound but have picture
Check if there is sound input signal
Yes
Check if there is signal at C220 and C221
Yes
Check if there is signal at C601 and C602
Yes
Check if there is signal at FB11,FB12,FB13,FB14
Yes
Check the speakers
Still having problems
No
Check the input source
No
Change U202
No
Check LD3 voltage
Else
LD3
Change Mainboard
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Service Manual
Model No.:
12V
Change UD3