technician, steam deck, handheld gaming device, disassembling, small screwdrivers, electronic parts, circuit board, thermal paste application, screen replacement, joystick calibration, button testing, cleaning dust, reassembling, workbench, organized tools, magnifying glass, LED lamp, focused light, detailed work, close-up shot, 3/4 view, high-resolution textures, metallic surfaces, rubber grips, plastic casing, technical manual, indoor setting, repair shop environment, ambient lighting, professional.