Handheld consoles fail in predictable ways, and most failures are cheap to fix yourself.
Drift, clicks and dead pixels
Joystick drift is the #1 failure — a replacement module costs a fraction of a new controller and takes 20 minutes with a triwing screwdriver. Sticky buttons need only contact cleaning. Dead pixels or cracked screens are straightforward panel swaps on the Switch Lite and Steam Deck — buy a kit that includes adhesive and tools.
Batteries and cooling
Battery swelling demands immediate replacement — do not charge a swollen pack. Replacement batteries for the Switch Lite and Deck are model-specific; match the part number. If your handheld throttles or the fan roars, replace the internal fan and repaste the APU.
All common parts are in our repair kits collection.