Bookmark this: 19V in → 3.3V linear → 5V linear → 3.3V/5V PWM out . If that chain breaks, the ILPI354 (or its support resistors) is the culprit.
Different versions of this board exist (identified by the "Coccygeal vertebra number" on marketplaces like AliExpress ilpi354 va schematic updated
Detailed repair steps and partial circuit diagrams are frequently shared on forums like . Bookmark this: 19V in → 3
ILPI-354 V.A (schematic or board view) typically refers to the power supply board ILPI-354 V
The switching transistor ( Q1 ) attached to the primary heatsink is a high-stress point. If shorted, always check the source resistor and the PWM chip for collateral damage. 4. Safety Warning
: The LED driver section (managed by IC601 on some revisions) may fail, causing the screen to remain black while the power LED is on.
The ILPI354 VA schematic has been updated to improve power delivery and simplify layout for modular LED driver applications.