Computer Graphics Display Output: incorrect display-detection state. The graphics system fails to recognise a connected monitor or its reported capabilities.

The distinguishing clue

The monitor is missing or offered incorrect modes despite a compatible connection.

Checks before an assessment

Record the affected display, port, resolution and refresh rate. Compare a known cable and display if the connectors are sound; stop load tests if excessive heat accompanies artefacts.

Stop point: Stop high-load testing if artefacts are accompanied by excessive heat or burning smell.

Workshop confirmation and repair

Device-level check: Compare another cable and display, inspect temperatures and separate software from hardware rendering.

Targeted check: Compare display detection and supported modes with a known cable and screen. If confirmed: Repair the confirmed detection path or correct its driver configuration.

Repair boundary: Repair driver state or the confirmed graphics card, connector or board path.

Related cause to rule out

When one connected screen is blank while another active display shows the desktop, also consider Computer Graphics Display Output: display output selection before choosing a repair.

Checks after the work

After repair or replacement, check native resolution, multiple outputs, video playback, graphics load and restart.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.