📌 DIY Dummy VGA Adapter — Make Your PC Boot Without a Monitor
In this video, I show how to build a simple dummy VGA adapter using just three resistors. Some motherboards refuse to boot without a connected display, which is a problem if you want to run a headless PC, a Home Assistant server, or any system without a monitor.
A dummy VGA plug solves this by simulating a “ghost” monitor so the GPU initializes normally.
🔧 What you’ll see in this video:
Why some PCs won’t boot without a monitor
How a dummy VGA dongle works
Step-by-step build using common resistors
Alternative resistor values if you don’t have 120 Ω
How to connect the pins correctly
Testing the adapter on a real motherboard
🧰 Materials Used:
3 × resistors (around 120 Ω, any close value works)
📌 DIY Dummy VGA Adapter — Make Your PC Boot Without a Monitor
In this video, I show how to build a simple dummy VGA adapter using just three resistors. Some motherboards refuse to boot without a connected display, which is a problem if you want to run a headless PC, a Home Assistant server, or any system without a monitor.
A dummy VGA plug solves this by simulating a “ghost” monitor so the GPU initializes normally.
🔧 What you’ll see in this video:
🧰 Materials Used:
💡 Why make this?
Perfect for:
user13