Hisense MTK8222 - Function Key Troubleshooting

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LCD TV Service Manual
Hisense Confidential
4.4.2 Troubleshooting for Function Key
Buttons does not work
Check switches
Check key board
Check Key BD cable
Change Key BD
Replace main board
Check solder connections and
see if any switches are stuck.
Replace Key BD
OK
YES
YES
NO
YES
NO
NO