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TPS23861: TPS23861 no output

Part Number: TPS23861

Dear all:

I have a motherboard using TPS23861, connected to the POE camera, the camera does not work, the measurement POE waveform found that the detection phase does not pass, has been in the detection phase, the waveform is as follows:

POE camera is good, I verified it with the motherboard without any problem, it can work normally, the waveform is as follows:

This phenomenon seems to be that the characteristic resistance of 24.9KΩ is not detected or the characteristic capacitance value is incorrect.Which part of the circuit should I check? The circuit diagram is in the attachment,5661.POE.pdf thank you!