Experiencing a CRU black screen issue is fairly common when setting unsupported resolutions or refresh rates through Custom Resolution Utility. This typically happens if the display cannot handle the new settings, causing it to go blank after applying changes. To fix this, users can restart their graphics driver using a keyboard shortcut, boot into safe mode, or reset the CRU configuration to restore default display settings. It’s important to test new resolutions carefully to avoid triggering a black screen and ensure smooth, stable performance.