TPS23754: The customer used TPS23754 to make a PD Moudle(25w), and now there is no power supply problem.

Part Number:TPS23754

hi sir/madam,

  The customer used TPS23754 to make a POE board (25w), and now there have problem that no power supply. Now, even the detection and classification waveform have not come out. The attachment is the schematic diagram, can you help to see, where is the problem?(Please visit the site to view this file)