DisplayPort - signal loss or image flickering

What is DISPLAYPORT-NO-SYNC?

The DISPLAYPORT-NO-SYNC error is categorized as a medium-severity graphics card (GPU) issue that can significantly impact your PC's stability. Monitor connected via DisplayPort randomly flickers, dims, or loses sync. When experiencing the DisplayPort - signal loss or image flickering fault, users often report sudden system crashes, unresponsive behavior, or a blue screen of death (BSOD). In most diagnostic scenarios, this problem is directly triggered by underlying hardware or software complications such as 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) and displayport 1.4 disabled in gpu bios. To permanently resolve the DISPLAYPORT-NO-SYNC issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your graphics card (GPU) components are functioning correctly.

Common 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

Step-by-Step Fix Guide

• 1
  Replace the cable with a certified DP cable

  Applying the first fix (Replace the cable with a certified DP cable) addresses the most common root cause of DISPLAYPORT-NO-SYNC and restores baseline functionality.

• 2
  Lower the refresh rate in Display Manager

  If the problem persists, proceeding with the remaining steps ensures all edge cases related to gpu instability are covered.

• 3
  Turn off G-Sync/FreeSync as a test

Commands & Diagnostics