This is the power button, with cable, compatible with the Dell Vostro 5401 and 5402 laptops. This board mounts to the underside of the palmrest assembly.

Compatible Dell Laptops:
Vostro 5401
Vostro 5402

DPart Number: M84KW

alt Part Number's:
MKB_V14_POWER_FFC
450.KN02.0021