Dell Power Board for Monitor 21204-00411 - PSU & Inverter Board

A failed power board is one of the most common reasons a Dell monitor goes dark or refuses to power on. The Dell 21204-00411 is a replacement power supply and inverter board that restores proper power delivery and backlight function to compatible Dell monitors.

Who is it for

This board is intended for technicians and advanced users repairing Dell 1704FPV, 1905FP, 1703FP, 1907FP and similar monitors. It is a direct replacement part that mounts in the original screw holes and connects to the existing internal wiring.

Main features

• Combined AC-to-DC power supply and CCFL backlight inverter
• Supports up to four CCFL lamps for even backlight illumination
• Wide AC input range: 100-240V, 50/60Hz
• Provides +5V and +12V DC outputs for monitor logic and panel
• Built-in over-voltage, over-current, and short-circuit protection
• FR-4 printed circuit board with screw-mount design

Specifications

• Manufacturer Part Number: 21204-00411
• Brand Compatibility: Dell
• Monitor Model Compatibility: Dell 1704FPV, 1905FP, 1703FP, 1907FP (and similar models)
• Board Function: AC-to-DC power conversion and high-voltage generation for CCFL backlights
• Input Voltage: 100-240V AC, 50/60Hz
• DC Output Rails: +5V, +12V
• Backlight Technology: CCFL (Cold Cathode Fluorescent Lamp)
• Number of CCFL Lamp Outputs: 4
• Mainboard Connector: Multi-pin DC power output connector
• AC Input Connector: Internal AC power input header
• Board Material: FR-4 Printed Circuit Board
• Mounting Type: Screw-mount design
• Protection Features: Over-voltage protection (OVP), Over-current protection (OCP), Short-circuit protection (SCP)

Tips

Before replacing the power board, verify that the monitor's AC cord and mainboard are not the cause of the failure. Disconnect the monitor from power and discharge any residual voltage before handling the board. Match the board revision and connector layout to your monitor model to ensure compatibility.