Display, graphics and audio troubleshooting
Fix blank, blurry and flickering screens, monitors on docks, graphics driver problems and audio that plays or records on the wrong device, with evidence rather than guesswork.
- Level
- Intermediate
- Length
- About 50 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Trace a display signal path (GPU, port, cable, dock, monitor input) and identify which link limits resolution or refresh rate.
- Correct resolution, scaling and refresh rate settings and explain why a non-native resolution looks blurry.
- Recover from graphics driver problems in the least disruptive order and collect dxdiag evidence for escalation.
- Configure playback and recording devices, communications devices and per-app outputs so calls and media use the right device.
Course outline
- 1.Display, graphics and audio troubleshootingVideo · 5 min
- 2.Monitors, docks and the signal pathLesson · 8 min
- 3.Resolution, scaling and graphics driversLesson · 8 min
- 4.Audio devices, communications and Bluetooth headsetsLesson · 8 min
- 5.Display, graphics and audio troubleshooting: knowledge checkKnowledge check · 19 questions
- 6.Display, graphics and audio troubleshooting: practical exerciseKnowledge check · 1 question
- 7.Second monitor blank on the new dockScenario
- 8.Final exam8 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- Microsoft Support: Troubleshoot connecting Windows to external displays
- Microsoft Support: Fix sound or audio problems in Windows
- Microsoft Learn: DirectX Diagnostic Tool (dxdiag)
- VESA DisplayPort Alt Mode on USB Type-C (overview)
See it with your own jobs and topics
Tell us about your team and we'll walk you through setup, from choosing jobs to your first skills check.