Dell Inspiron 15-5551 Service Manual page 61

3 Slide the power-button board cable out through the slot on the palm-
rest assembly.
1 slot
4 Close the display and turn the computer over.
5 Remove the screw that secures the power-button board to the palm-rest
assembly.
6 Peel off the tape from the power-button board.
2 power-button board cable
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