: Check the PFC MOSFET and controller if the main filter capacitor is not reaching approximately 400V DC.
If you find a file named 17ips72_NM-D811_r1.0.pdf , verify its hash or compare page count. A typical Lenovo Compal schematic has 52 pages. Any file with fewer than 30 pages is likely incomplete or a fake. 17ips72 schematic
The term refers specifically to the printed circuit board (PCB) documentation for a family of Lenovo motherboards—most notably those powering the Legion 5 (15/17-inch) and select IdeaPad Gaming 3 units from 2020–2022. These schematics are the Rosetta Stone for troubleshooting no-power issues, short circuits, USB-C charging failures, and dead CPU rails. : Check the PFC MOSFET and controller if