Second monitor not detected

Check cable/input and select Detect in Windows display settings.

How to troubleshoot

1. Check whether the issue affects one device or several, and note when it started.
2. Check cable/input and select Detect in Windows display settings.
3. If hardware is failing or data is at risk, stop and request professional assistance.

When to get professional assistance

If these steps do not resolve the issue, or you suspect failing hardware, data loss, a security incident, or a production-system problem, consider qualified technical support. Back up important data where possible and obtain authorization before changing business systems.

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