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The speakers are finally accessible. The wires seem unnecessarily routed and are taped in several places, but at least they're modular.
The motherboard is removable after the heat sink assembly and a small bracket are removed, and after some cables (mostly labeled) connectors are disconnected.
The motherboard contains the CPU, memory, volume buttons, and ports. High-wear components like ports and buttons make for very expensive replacement when they're soldered to the motherboard.