What's going on

DisplayPort uses a complex packet-based protocol compared to standard HDMI. Instead of continuously sending a raw video stream, your graphics card and ASUS monitor establish a dynamic link training handshake to agree on resolution, refresh rate, and bandwidth protocols.

When your ASUS ROG, TUF, or ProArt display shows a "No DisplayPort Signal" message, it means the handshake failed. The graphics card thinks a display is present, but the monitor's scaler chip did not successfully establish communication, causing the screen to drop straight into power-saving mode.

Symptoms people notice

• The Brief Popup: You turn on the PC, the ASUS logo shows up, followed by a "No DisplayPort Signal" overlay, and the power LED shifts to amber or orange.
• Post-Sleep Black Screen: The monitor works fine during normal use, but once Windows puts the screens to sleep, the DisplayPort input refuses to wake up.
• HDMI Works, DisplayPort Doesn't: Plugging in an HDMI cable immediately displays your desktop, but swapping back to DisplayPort breaks the image.
• Ghost Displays: Windows display settings show two active monitors and allow you to move your mouse off-screen, yet the ASUS panel is entirely black.

Likely causes

Most DisplayPort drops on ASUS panels stem from handshake logic rather than dead components.

1. Deep Sleep Bugs: ASUS gaming monitors are notorious for power-saving states ("DP Deep Sleep") where the internal control board fails to listen for incoming signals once it powers down.
2. Pin-20 Cable Power Issues: Cheap or non-certified DisplayPort cables sometimes feed 3.3V power back into your graphics card or monitor, interfering with startup handshakes.
3. Display Stream Compression (DSC) Glitches: High refresh rate 4K or 1440p displays overload cable bandwidth capabilities if DSC drops mid-session.
4. Windows Display Cache Corruption: Windows can save an invalid timing configuration for your monitor, causing the GPU to send an unsupported resolution over DP.

Quick checks first

Before opening up menus, check the physical connections. Ensure the DisplayPort cable clicks locked into your dedicated graphics card—not the motherboard's video output.

If you are using display adapters or docking stations, bypass them and plug straight into the GPU. You can also consult our general monitor troubleshooting guides for broader isolation steps.

When it's a real hardware fault

If you have swapped cables, hooked the monitor up to a completely different PC, and still get "No DisplayPort Signal" on every port while HDMI functions perfectly, the internal DisplayPort interface or main board logic may be damaged.

Physical damage to the DisplayPort connector pins is common if cables are yanked without releasing the locking latch. Internal main board component failures—such as blown ESD protection diodes near the port or a degraded scaler IC—will prevent signal recognition altogether.

Soft resets vs board/panel work

Software fixes, hard power drains, driver cleanups, and OSD configuration changes resolve well over 80% of ASUS DisplayPort loss issues. You do not need to take the monitor apart for these fixes.

However, if the physical port on the main board is cracked or the main controller IC is shorted, fixing it requires micro-soldering and internal main board replacements. Because modern LCD panel assemblies and mainboard parts are difficult to source securely, component-level board repairs are rarely cost-effective compared to replacing the display.

Next steps

Try performing a complete power drain and turning off Deep Sleep in the monitor's menu options first. If that fails, test a VESA-certified DisplayPort 1.4 cable on a different display port on your graphics card. For users exploring upgrade options or checking panel specs before taking action, review our latest display reviews to compare newer monitors with better power-management stability.