Hisense 40LE45S - Video;S-Video Input Problems

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LCD TV Service Manual
Hisense Confidential
7.7 Troubleshooting for Video/S-Video input
No picture on the screen
Check Source work or not
Check connect
Check Cable/ Wires
Replace main board
Check Signal Source
Reconnect
Replace Cable/Wires
NO
YES
YES
NO
YES
NO