1. Introduction
This manual provides essential information for the proper installation and use of the Onyehn RP2040 CPU Cable Chip, designed as a replacement and upgrade component for the Nintendo Switch OLED console. This product is intended for users with advanced technical skills and experience in micro-soldering.

Figure 1.1: Overview of the Onyehn RP2040 CPU Cable Chip components.
2. Important Safety Information and Professional Installation Requirement
WARNING: Installation of this product requires advanced micro-soldering skills and specialized tools. Improper installation can lead to permanent damage to your Nintendo Switch OLED console and the product itself. It is strongly recommended to seek professional assistance for installation.
- Always disconnect the console from all power sources before beginning installation.
- Wear appropriate personal protective equipment, including anti-static wrist straps and eye protection.
- Ensure your workspace is clean, well-lit, and free of static electricity.
- The chip is not pre-flashed. Firmware flashing is required after physical installation for the device to function correctly.
3. Package Contents
Verify that your package contains the following items:
- Onyehn RP2040 CPU Cable Chip (as shown in Figure 3.1)
- Protective packaging (as shown in Figure 3.2 and 3.3)

Figure 3.1: The Onyehn RP2040 CPU Cable Chip.

Figure 3.2: Product packaging, showing the chip inside a green foil pouch within a white outer pouch.

Figure 3.3: The green foil anti-static pouch.
4. Compatibility
This Onyehn RP2040 CPU Cable Chip is exclusively compatible with the Nintendo Switch OLED (Model HEG-001). It is not compatible with the original Nintendo Switch or Nintendo Switch Lite models. Please verify your console model before attempting installation.
5. Setup and Installation
The installation process involves disassembling the console, micro-soldering the chip, and flashing the necessary firmware. Due to the complexity and precision required, professional installation is highly recommended.
5.1. Pre-Installation Steps
- Verify Console Model: Confirm your console is a Nintendo Switch OLED (HEG-001).
- Gather Tools: Ensure you have all necessary tools, including a precision soldering iron, fine-gauge solder, flux, magnification, and a 30AWG magnetic wire for connections. Using other wire types may damage the solder pads.
- Prepare Workspace: Set up a clean, static-free environment.
5.2. Physical Installation (Soldering)
This step requires careful adherence to specific soldering points and techniques for the Nintendo Switch OLED. Refer to detailed installation guides and diagrams available from reputable modding communities or professional resources. Pay close attention to the DAT0 flex cable and other connection points.
5.3. Firmware Flashing
After the physical installation is complete, the RP2040 chip must be flashed with the appropriate firmware. The chip is shipped without pre-flashed firmware. Follow the specific instructions provided by the firmware developer to flash the .uf2 file onto the RP2040 chip. The console will not boot normally until the firmware is successfully flashed.
6. Operating Instructions
Once the Onyehn RP2040 CPU Cable Chip is correctly installed and the firmware is flashed, the Nintendo Switch OLED console should power on and operate as expected, with the added functionality provided by the chip. No specific user operation is required for the chip itself beyond its initial setup.
7. Maintenance
The Onyehn RP2040 CPU Cable Chip is an internal component and requires no routine user maintenance after installation. Avoid exposing the console to extreme temperatures, moisture, or physical shock, as these can damage internal components, including the installed chip.
8. Troubleshooting
- Console Does Not Boot After Installation:
- Check Firmware: The most common reason for non-boot is that the RP2040 chip has not been flashed with the necessary firmware. Ensure the firmware flashing process was completed successfully.
- Inspect Soldering: Carefully re-inspect all solder points for bridges, cold joints, or disconnected wires. Improper soldering is a frequent cause of issues.
- Verify Connections: Ensure all flex cables and wires are correctly seated and connected.
- Console Functionality Issues: If the console boots but exhibits unexpected behavior, re-check all installation steps, especially soldering quality and firmware integrity.
- Missing Components: If your package arrived with missing components (e.g., CPU ribbon cable), contact the seller immediately for assistance.
9. Specifications
| Brand | Onyehn |
| Model | RP2040 |
| Cable Type | Internal Console Cable |
| Compatible Devices | Nintendo Switch OLED (HEG-001) |
| Connector Type | 4 Pin ATX (Internal) |
| Connector Gender | Male-to-Male |
| Number of Pins | 4 |
| Maximum Voltage | 5 Volts (DC) |
| Special Feature | Data Transfer |
| Specification Met | RoHS |
10. Warranty and Support
For warranty information or technical support regarding the Onyehn RP2040 CPU Cable Chip, please contact the seller directly through your purchase platform. Ensure you retain your proof of purchase for any warranty claims.