According to community forums like Elektroda , the 17IPS72 series is known for specific component failures: YouTube·MrReeceyburger123 17IPS72 Repair

Why is the so vital? Unlike linear power supplies, SMPS boards operate at high frequencies with feedback loops. Without a schematic, you are essentially working in the dark.

Often the FAN7529, which manages the switching frequency of the PFC MOSFET (Q1) to ensure energy efficiency.

17IPS72P Power Supply Schematic. This document contains a schematic diagram of a power factor correction (PFC) controller circuit.