ASUS · Zenbook Duo UX8406 · Core Ultra 9 185H · Windows 11
ASUS Zenbook Duo UX8406 Second Screen Not Working Fix
The ASUS Zenbook Duo UX8406 features a dual-screen design with a primary OLED display and a secondary ScreenPad Plus. When the secondary screen goes blank, shows no output, or stops responding to touch, the cause is almost always a driver or ScreenXpert software issue rather than a hardware failure.
Step 1 — Install or update the ScreenXpert app
Go to the ASUS Support page, search Zenbook Duo UX8406, and download the latest ScreenXpert application. Install it and restart. Without ScreenXpert, the secondary display initialization fails on every boot because Windows does not natively manage the Zenbook Duo display bus configuration.
Step 2 — Update the Intel or NVIDIA display driver
Download the latest Intel Arc graphics driver and NVIDIA RTX 4070 driver from ASUS Support for the UX8406. Run both installers and restart. Display driver version mismatches between the two GPUs can cause the secondary screen to fail to initialize after a Windows or driver update.
Step 3 — Check display settings
Go to Settings → System → Display. If only one display appears in the layout, click Detect. If the secondary screen is listed but marked as disabled, click on it and set it to Extend desktop to this display. Windows may have disabled it after a sleep cycle or restart.
Step 4 — Update the BIOS
Install the latest BIOS from ASUS Support for the Zenbook Duo UX8406. ASUS has shipped BIOS updates for this model that fix secondary display power sequencing issues, where the ScreenPad Plus fails to power on correctly after a cold boot or resume from sleep.
Step 5 — Reinstall ScreenXpert and the ASUS System Control Interface
Uninstall ScreenXpert and ASUS System Control Interface from Control Panel. Restart, then reinstall both from ASUS Support in this order: ASUS System Control Interface first, then ScreenXpert. This resolves conflicts where the two packages are version-mismatched after a Windows Update.
Amirah, Petaling Jaya: “My Zenbook Duo secondary screen went dark after a Windows update. Reinstalling ScreenXpert from ASUS Support and clicking Detect in Display Settings brought it back. Took about five minutes.”
Frequently Asked Questions
Why does the second screen on the ASUS Zenbook Duo go blank after sleep?
The ScreenPad Plus sometimes fails to reinitialize after a sleep or hibernate cycle. The quickest fix is to open ScreenXpert and toggle the secondary screen off and back on. Updating to the latest BIOS and ScreenXpert version usually prevents this from happening on resume.
Can I use the Zenbook Duo second screen without ScreenXpert?
As a basic extended display, yes — Windows can manage it in Display Settings without ScreenXpert. However, the advanced features (window snapping to the secondary screen, app shortcuts, and orientation locking) require ScreenXpert to be installed and running.
Does the secondary screen support touch input on the UX8406?
Yes. The ScreenPad Plus on the UX8406 supports full ten-point multi-touch. If touch stops working on the secondary screen, check Device Manager for the secondary HID touch device and update or reinstall its driver from ASUS Support.
Can I set different refresh rates on the two screens?
Yes. In Display Settings, click on each display and go to Advanced display to set the refresh rate independently. The primary OLED panel supports higher refresh rates than the secondary ScreenPad Plus, and Windows allows mixed-refresh configurations on this dual-screen setup.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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