This usually indicates a frequency shift in the PWM loop. Check the timing capacitor and resistor (RT/CT) shown on the schematic near the controller IC. Safety Warning
Chinese and international forums often contain the best information for this OEM part. Sites like and BadCaps (International) have user-generated content specifically for the ILPI-354.
provide community-verified component values and pinouts for the ILPI series.
Replacement boards are often available for around $15–$25 on if the board is scorched or unrepairable.
Measure the standby voltage (usually ) at the output connector .
The ILPI-354 is a serviceable power board. With the that secondary capacitor failure is the leading cause of issues, most repairs are straightforward. For best results, use high-temperature (105°C) low-ESR capacitors for replacements to ensure long-term stability in the confined space of the monitor casing.
Check the main AC fuse. If open, check the bridge rectifier and primary MOSFET for dead shorts.
: Delivers a stabilized 5V DC rail for the logic/scaler board logic gates and variable higher-voltage rails specialized for the W-LED backlight string . Architectural Functional Blocks
If the monitor is completely dead, check the ceramic fuse near the AC input.
: A massive voltage surge usually destroys the primary circuit protection.
Below is a structured technical overview that can serve as the foundation for your documentation. 1. Board Identification PCB Number: ILPI-354 V.A (Part number: 491A011H1400H03).
If you want an actual drawn schematic diagram or PCB files (KiCad/Altium), say which format and I’ll generate the netlist and instructions.