PCBA, POWER BD

HP Power Button Board 905754-001 is the replacement power button board assembly listed in HP’s service guide for ProBook 450 G4 and 455 G4 notebooks. It is the board component used for the laptop’s power button.

The guide identifies 905754-001 as the board assembly and describes it as a separate part from the power button board cable. That cable is listed as 905769-001 and comes in Cable Kit 906000-001. During service, the board connects to a cable and is secured to the top cover with a screw.