The TPS23754PWPR, a Power over Ethernet (PoE) powered device (PD) controller from Texas Instruments, is widely used in various networking and industrial applications. While it offers excellent performance, engineers may encounter certain troubleshooting challenges during the design and deployment phases. This article provides a detailed guide to common troubleshooting issues related to the TPS23754PWPR and offers actionable solutions to ensure smooth operation and high reliability.