Due to the compact nature and low cost of the ILPI-354 V.A, sourcing a full replacement board via platforms like AliExpress or eBay is often faster and more economical than attempting complex traces or chip replacements if the primary PCB substrate becomes charred.
Thermal stress fractures on solder pads, degraded primary switching MOSFET
Fast-recovery Schottky diodes rectify the high-frequency AC outputs from the secondary transformer windings. Electrolytic capacitors then smooth these pulses into clean DC rails (typically 5V for logic and 12V to 19V for the backlights). Ilpi-354 V.a Schematic
: Typically provides a regulated 5V DC supply to the main control logic board and a higher voltage (around 17.5V–18V ) for the LED driver circuit.
Leaking or bloated electrolytic capacitors in the secondary stage. Due to the compact nature and low cost of the ILPI-354 V
Dell E1916HV and E2016H / E2016HL.
The core of the power supply is the IC. This chip is a Richtek R7731AGE , a 6-pin, SOT-23-6 packaged "Burst Triple Mode PWM Flyback Controller". : Typically provides a regulated 5V DC supply
Attempting to repair this board without the Ilpi-354 V.a diagram is like navigating a maze blindfolded. Here is why the schematic is non-negotiable:
: A dedicated section of the board regulates the current sent to the LED strips that illuminate the screen. Safety Isolation
The input stage features standard protection components; if the unit is "dead," check the main fuse and the primary filter capacitor (typically rated for ~310V-450V). Capacitor Reliability:
Uses a combination of X/Y-rated capacitors and a dual-winding common-mode choke coil to suppress electromagnetic interference before it reaches the rectifier. 2. Primary Rectification & Filtering