Power Button and I/O Audio Board for Lenovo, model 5C50K48444 (replacement board)

Replacement power button and I/O audio board compatible with Lenovo systems. This modular board integrates the power button control and audio input/output interfaces to restore and maintain essential functions in compatible Lenovo laptops and desktops. Designed for repair and refurbishment tasks, the board provides a direct replacement option to recover power-on functionality and headset or microphone port operation without replacing the entire device.

Advantages

The board offers a compact, replaceable module that reduces repair time and cost compared with full-unit replacement. Its integrated layout combines the power control button and audio I/O on a single assembly, simplifying disassembly and reassembly. Built to fit original mounting points and connector locations for compatible Lenovo systems, it helps retain original device fit and finish while restoring reliable tactile response for the power button and stable audio connections.

Suitable for

• Repairing laptops or desktops with a non-functioning power button
• Restoring headset, microphone, or speaker port functionality
• Refurbishment projects to bring devices back into service
• Maintenance tasks where localised board replacement is preferred

Key specifications

• Functionality: integrated power button control and audio input/output interfaces
• Form factor: small modular PCB designed for specific Lenovo chassis mounting points
• Connectors: board-mounted cable connector compatible with corresponding system board harnesses
• Interface types: standard 3.5 mm audio jack(s) and tactile power switch
• Compatibility: designed for use in compatible Lenovo laptop and desktop models (confirm physical fit and connector match before installation)

How to use

Power down the device, disconnect from mains and remove the battery if applicable. Open the device chassis following manufacturer disassembly guidance to access the internal modules. Locate and carefully disconnect the existing power button and audio board cable from the system board, remove any mounting screws or clips, and extract the faulty module. Position the replacement board in the same orientation, secure it to the chassis using the original screws or clips, and reconnect the cable to the mainboard ensuring correct alignment. Reassemble the device, reconnect the battery and power, and verify that the power button and audio ports function as expected. If uncertain, consult service documentation or a professional technician.

Recommendations

Handle the board using ESD-safe practices, avoid bending or stressing the cable and connector, and verify compatibility with your exact Lenovo model before purchase. If audio issues persist after replacement, test with known-good headsets and check system audio drivers and settings.