HP 840738-001 hinge cover is a replacement service part for the display assembly of 15-inch products covered by HP’s service guide. It is listed as the hinge cover for 15-inch models, helping cover the display hinge area as part of the laptop’s assembled display.
This part number is for the 15-inch non-touchscreen hinge-cover entry. HP lists a separate reference, 845835-001, for hinge covers on 15-inch touchscreen products, so these variants should not be conflated.
HP’s service guide treats hinge covers as removable components during display assembly servicing. The part is identified as 840738-001.