We repair Xbox Series X, Series S, Xbox One, Nintendo Switch, Switch Lite and Switch OLED — so the first step is a proper diagnosis to confirm whether the fault is a port, the power system, thermals, or storage.
The Nintendo Switch fails in ways the home consoles do not, because it is the only one that gets carried around and plugged in several times a day. The single most common fault we see is a worn USB-C port: the console charges intermittently, then only at a certain angle, then not at all. That is a port replacement, not a new console, and the Switch Lite and OLED are the same job. Docking problems are the other pattern — a Switch that works handheld but gives no picture on the TV is usually the dock or its cable rather than the console, which is worth establishing before anyone opens anything. Cracked screens, dead batteries and water damage are all repairable too, and your games, saves and Nintendo account are untouched throughout.