The Nintendo Switch OLED (Model HEG-001) is more than just a screen upgrade. Under the hood, Nintendo and NVIDIA refined the original Tegra X1 architecture, fixed lingering power delivery issues from the V1/V2 models, and introduced a completely new display interface for the 7-inch OLED panel.
Are you troubleshooting a specific hardware issue like power failure or display output, or Schematic Nintendo Switch Oled
Additional Resources
Gaming Features
Nintendo provides external "System Diagrams" that identify user-facing hardware such as: Nintendo Switch Console Diagram | Support Deep Dive: Understanding the Nintendo Switch OLED Schematic