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4. Disconnect the flexible board from the two connectors (CN3001, CN3003) on the HN-449 board.
5. Remove the four precision screws, and then remove the HN-449 board.
6. Install the removed parts by reversing the steps of removal.
HN-449 board
CN3003
CN3001
Flexible board
Precision screws
(P2 x 4)