2-34 Removal and Replacement HP OmniBook 2100/3000/3100 Component Removal Procedures Additional Steps PCA, USB Plug-in module (page 2-4). Hard drive (page 2-5). Display (page 2-9). Keyboard (page 2-20). Top case (page 2-21). Motherboard, but only until the USB PCA is removed (page 2-24). The motherboard does not have to be removed. Plate, Lock Plug-in module (page 2-4). Hard drive (page 2-5). Display (page 2-9). Keyboard (page 2-20). Top case (page 2-21). Motherboard, but only until you can lift the front edge (page 2-24). Pull up on the lock plate until it comes out of the bottom case.