Laptop HDMI Output Port: wrong cable or connector revision. A replacement fits physically but uses different pin mapping or supported features.

The distinguishing clue

Basic power may work while data, video or sensing does not.

Checks before an assessment

Check the monitor's selected input and compare an undamaged, compatible HDMI cable. Note whether audio and video fail together.

Stop point: A loose HDMI plug can lever pads away from the motherboard.

Workshop confirmation and repair

Device-level check: Verify the monitor input and cable, compare another display and inspect the HDMI pins and shell.

Targeted check: Compare part numbers, pin count and supported protocol with the original. If confirmed: Install the correct revision and inspect for mismatch damage.

Repair boundary: Repair the connector or signal path only after graphics settings and the external equipment are excluded.

Related cause to rule out

When power may be present while data, video or negotiation is absent, also consider Laptop HDMI Output Port: interface controller fault before choosing a repair.

Checks after the work

After repair or replacement, check several resolutions, audio, hot-plug detection and a sustained display test.

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