For Agilent 34972A data collector channel no response issue, the core components to check include:

1. Communication interfaces (USB/LAN): Use an oscilloscope to monitor signal stability and check if USB interface chips have soldering problems (e.g.,虚焊) affecting data transmission.
2. Internal digital multimeter module: Verify if the equipped module functions normally as it is closely related to data acquisition.
3. Channel switching units: Inspect the switching components corresponding to the unresponsive channel for faults or poor connections.
4. Channel power supply circuits: Ensure the power supply for channel-related circuits is stable and meets specifications.

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