Graphics · medium

How to fixDISPLAYPORT-NO-SYNC

DisplayPort - signal loss or image flickering

What this error means

This medium-severity issue affects the graphics card (GPU). Monitor connected via DisplayPort randomly flickers, dims, or loses sync. It's also often linked to poor quality or too long DP cable (>1.8m without active converter). The steps below are ordered to resolve this efficiently.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Replace the cable with a certified DP cable

Replace the cable with a certified DP cable.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Lower the refresh rate in Display Manager

Lower the refresh rate in Display Manager.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Turn off G-Sync/FreeSync as a test

Turn off G-Sync/FreeSync as a test.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Poor quality or too long DP cable (>1.8m without active converter)
  • Monitor frequency set above cable limit (DP 1.2 vs DP 1.4)
  • DisplayPort 1.4 disabled in GPU BIOS

Useful Windows tools

These commands open Windows tools. Review any action inside the tool before applying changes.

dxdiag