Never work on the board while it is connected to the AC mains.
Comprehensive Guide to the ILPI-354 V.A Inverter Board Schematic Ilpi-354 V.a Schematic
The ILPI-354 V.A is a widely used power supply and inverter board found in various flat-panel LCD monitors. This board is responsible for converting incoming AC power into the stable DC voltages needed by the logic board, as well as generating the high-voltage AC required to strike and illuminate the Cold Cathode Fluorescent Lamps (CCFLs) used for backlighting. Never work on the board while it is
Failed CCFL lamp or failing inverter transformer. Ilpi-354 V.a Schematic
Smooths the ripple from the rectified DC. This is usually the largest capacitor on the board.