Ensure HDMI connection is secure and correct port is selected. Force connection by disconnecting for about a minute. Try different HDMI ports and displays. Test different HDMI cables
Ensure PowerPoint allows online content to display stock images. Remove and re-add images to presentation file. Try saving file in different location
Clear cookies and cache through Firefox menu panel. Check security software settings for image blocking. Disable web accelerator software if images don't load properly. Disable or uninstall problematic Firefox extensions. Reset Firefox preferences through about:config
Images may not display or show as broken icons in Chrome. Issues can stem from system configuration, Chrome settings, antivirus, or extensions
Restart monitor for 15 seconds or 30 minutes if overheating suspected. Check cable connections between monitor and computer. Restart computer to resolve operating system issues
Windows 10 screen may suddenly turn black when viewing videos with different text sizes. Issue commonly occurs during Windows 10 upgrade or computer connection. Main causes are inappropriate screen resolution and outdated video card driver