I’m experiencing intermittent display issues on an LED screen. The system starts normally, but after running for some time, artifacts or brief image distortion appear.
Current setup:
NovaStar control system
Screen resolution configured correctly
Image is stable at startup
Artifacts appear after 10–20 minutes of operation
Reboot temporarily restores normal display
Connection and environment:
Long signal cable runs between sender and receiver
Cables routed through equipment cabinets
No signal amplifier in use
Questions:
1.Can excessive signal cable length cause intermittent artifacts?
2.Could resolution or refresh rate settings contribute to this behavior?
3.What is the recommended way to verify the root cause?
Looking for real troubleshooting experience rather than general explanations.
This type of issue — where artifacts appear only after the system has been running for some time — is very typical and often related to signal quality.
Signal cable length:
Long cable runs or complex routing environments can cause signal attenuation and interference, leading to artifacts or misalignment, especially as system temperature rises.
Practical experience:
A quick test is to temporarily shorten the signal cable or replace it with a high-quality shielded cable. If the issue improves, it strongly indicates a signal transmission problem.
Recommended troubleshooting order:
1.Test with a shorter signal cable
2.Reduce refresh rate or output bandwidth
3.Reroute cables away from interference sources
4.Add signal amplification or repeaters if necessary
In most real-world cases, the root cause lies in the signal path rather than the display modules or control cards.