Samsung UN55HU7200F Service Manual page 32

Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
Check Power of 'T-con Board'.
CD220(T-CON) : VIN_12V
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BT1(T-CON) : VCC_1.15V
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Yes
Please, Contact tech support.
No Change the T-con Board.
4. Troubleshooting
4-5