Abnormal Signal From Other Interfaces - Sankey CLCD-2630 Service Manual

8．Abnormal signal from other interfaces
AV/S-VIDEO/YpbPr: No signal
Check antenna input
Confirm U23(CX32)
1． Power supply works
2． Crystal works
3． Re-position all right
4． Time and steps of electrifying
Check the electrocircuit of the input signal
HDMI: no signal
Confirm if there is signal input
Check the state of the chip on the connected
Check the connected cable
Confirm 24C02 DDC recorded
Check U11(9011)
1． Power supply works
2． Crystal works
3． Re-position all right
Check
RN2/RN3/RN5/RN6/RN7/RN8
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HDMI no sound
Check RN4
board
检查 U15(4334)工作正常
检查 U15(4344)外围电路