The HP 840737-001 LCD hinge kit is a display hinge replacement part for compatible HP notebooks with a 15-inch display. It is listed as an SPS-LCD hinge kit, intended for the laptop display assembly.
The listing associates this part with the HP ProBook 650 G2 and G3 and HP ProBook 655 G2 and G3. It also identifies multiple 15.6-inch HD and FHD display configurations, including slim and flat variants. This makes the part relevant to specific display assemblies across those ProBook models, rather than a universal hinge kit.