If you run a PC repair business, yes – hunt down the schematic PDF for common HP desktop models (EliteDesk, ProDesk). If you are a casual user, forget it; you won’t have the tools or skills to use it, and the search will expose you to scams.
Start at badcaps.net/forum or repair.wiki – search by HP motherboard code (e.g., “HP 8767” printed on the board itself), not the PC model name. hp desktop motherboard schematic diagram pdf