: The LED driver section (managed by IC601 on some revisions) may fail, causing the screen to remain black while the power LED is on.
Typically provides 5V (logic) and 12V–15V (inverter/backlight).
Different versions of this board exist (identified by the "Coccygeal vertebra number" on marketplaces like AliExpress ilpi354 va schematic updated
The inverter controller IC detects an over-voltage (OVP) or over-current (OCP) condition and enters protection mode to prevent fire hazards. Schematic Targets:
But the schematic you have looks like it was scanned in 2003, lost in a ZIP file, and reassembled by a bot. Where is the updated version? : The LED driver section (managed by IC601
The is a common power supply and inverter board used extensively in LCD monitors, most notably within various Vizio and HP models. Finding an updated schematic is crucial for technicians looking to resolve common power-on failures or "black screen" issues. 1. Overview of the ILPI-354 VA Board
is the primary power supply unit (PSU) used across several budget-friendly Dell monitors. When a monitor suddenly refuses to power on, flickers, or suffers from a dim backlight, an issue on this board is almost always to blame. Understanding an allows bench technicians and DIY enthusiasts to troubleshoot down to the component level instead of replacing the entire circuit board . Hardware Compatibility Matrix ILPI-354 V.A board Go to product viewer dialog for this item. Schematic Targets: But the schematic you have looks
Most versions utilize the LD7575 or a similar Green-Mode PWM controller. The updated schematic confirms the startup resistor values (typically high-resistance, e.g., 1MΩ) which often fail open.
: A massive voltage surge usually destroys the primary circuit protection.
The "VA" (Voltage Adjustment) in your search refers to the adjustable output feature. Instead of being fixed, the PI354x family is , meaning you can set the output to any voltage within the operating range of the specific model using the resistor divider (R1, R2) on the EAIN pin. This trimmable feature is a core part of the design, which is why the keyword "ilpi354 va" is often found in discussions of these regulators.
Controls the switching of the MOSFET. Failure here usually means no 5V standby. B. Secondary Side (Low Voltage) This section produces the 5V and 12V outputs.