🖥️🔌 Dell 20V 4.5A Monitor Power Adapter
 
(20V DC • 4.5A • 90W • 4‑Pin Round DIN Connector)

This adapter delivers 90W of regulated DC power for Dell’s early UltraSharp LCD monitors. It uses a 4‑pin round DIN connector, not interchangeable with barrel or 3‑prong plugs.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 20V DC @ 4.5A (90W)
Connector: 4‑pin round DIN plug, keyed layout
Common part numbers: R0423, 0R0423, ADP‑90FB, PA‑9, LSE0202C2090
 
🖥️ Compatible Dell Monitors
🟦 Dell UltraSharp Series
UltraSharp 2001FP (20.1″ LCD)
UltraSharp 2000FP (20.1″ LCD)
UltraSharp 2100FP (20.1″ LCD)
🟦 Dell Flat Panel TFT LCDs
Dell 2001FPb
Dell 2000FPb
 
✅ Common Uses
🔌 Powering Dell UltraSharp 20.1″ LCD monitors
🧩 Replacing lost or damaged OEM R0423 / ADP‑90FB adapters
🧪 Supporting legacy Dell display restoration and archival setups
🧵 Essential entry for Dell’s external‑brick monitor ecosystem
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 20V DC, 4.5A
🔌 Connector: 4‑pin round DIN plug
🔁 Not interchangeable with Dell laptop adapters (different voltage and connector)
 
⚠️ Things to Watch Out For
📉 Must be 20V — 19.5V laptop bricks won’t reliably power these monitors
🔌 Connector is 4‑pin DIN — won’t fit barrel or rectangular jacks
🧯 Always confirm “DC IN 20V” on the monitor label before substitution
📏 Some aftermarket replacements mis‑wire the 4‑pin — verify pinout before use
 
🛠️ Quick Tips for Beginners
🧭 Look for “DC IN 20V” near the monitor’s power jack
🔌 Confirm connector: round 4‑pin DIN, keyed
🧪 If monitor won’t power on, inspect DIN pins for bending or corrosion
🧯 Label clearly to avoid mix‑ups with Dell laptop adapters
🧵 Keep this entry in your Dell monitor power catalog