HP 859531-001 is an LVDS display panel cable for the FHD display assembly in the HP Chromebook 13 G1. It connects the display assembly as a replacement service part when the corresponding cable needs to be replaced.
The assembly includes the HD camera/microphone module cable, bringing those display-side connections together. HP lists this part for the FHD configuration; the QHD+ LVDS cable is a separate part, 861672-001, so this number identifies the FHD variant.
The cable is handled during display assembly service and routed along the display enclosure. The service guide identifies it as a replaceable component of the Chromebook 13 G1 display assembly.