“Enter the Steam Deck” (2022)
The back cover of the Steam Deck is easy to remove and reveals the device's internals, like the fan, battery, and button boards.
This ease of access is part of the reason this device earned a respectable 7/10 repairability score.
Another great feature is that each of the button boards are labeled with an “L” or “R” to identify the left or right side, respectively. For more info, check out our Steam Deck guides:

iFixit
Steam Game Console Repair Help: Learn How to Fix It Yourself.
Repair guides and disassembly information for Valve's SteamOS-based gaming devices.
