PCBA, POWER BUTTON BD

HP 858974-001 power button board is a replacement board for the laptop’s power button assembly. HP identifies it as “PCBA POWER BUTTON BD,” a service part used in supported Pavilion notebook configurations.

The HP service guide lists this board for Pavilion 15-bc000 models and gives 858966-001 as a separate cable part number. A specialist parts listing also associates the board with the Pavilion 15-BC and 15-AX families. The guide shows the board as a removable component secured by a screw, useful information for repair planning.

This listing is for the board, not the separately numbered cable. The confirmed identification helps distinguish the power button board from other internal boards and its cable.