Quick Answer

"No signal" on a ROG Ally X when docked usually means the dock or USB-C cable doesn't carry video, the Ally isn't set to output, or the cable is in the wrong port. Use a video-capable USB-C cable, connect to a dock that supports DisplayPort Alt Mode, and check Armoury Crate display settings. The ROG Ally X runs roughly R13,000-R16,000 in SA.

Why The Ally X Shows No Signal On A Screen

The ROG Ally X outputs video over its USB-C port, but only with a cable and dock that support DisplayPort Alt Mode. A charge-only USB-C cable carries power but no video, giving "no signal". Use the cable that came with a video-capable dock, or one rated for video, and connect to a dock or hub that lists DisplayPort/HDMI Alt Mode support.

Steps To Fix It

First, swap to a known video-capable USB-C cable. Second, confirm the external monitor's input is set to the right HDMI/DisplayPort source. Third, in Windows display settings (Win+P), choose Duplicate or Extend so the Ally drives the external screen. Update the Ally's BIOS and AMD driver, since outdated firmware can cause output glitches.

Dock And Resolution Notes

A good USB-C dock that supports the Ally's output lets you run a 1080p or 4K external screen. For 4K 60Hz you need a dock with sufficient bandwidth. If the screen flickers or drops out, try a different dock port or a shorter, higher-quality cable.

FAQ

Why does my ROG Ally X give no signal when plugged into a monitor?

Usually a charge-only USB-C cable that carries no video, or a dock without DisplayPort Alt Mode support. Use a video-capable cable and a compatible dock to fix it.

How do I make the ROG Ally X output to an external screen?

Connect a video-capable USB-C cable to a supported dock, set the monitor's input correctly, then press Win+P and choose Duplicate or Extend in Windows.

Does the ROG Ally X need a special dock?

It needs a dock or hub that supports DisplayPort Alt Mode over USB-C. A simple charge-only adapter won't carry video, causing the no-signal problem.

TIP

| Test with the cable from a video-capable dock first - a charge-only USB-C cable is the most common cause of no signal on the Ally X.