Let’s help you diagnose and resolve some common display hardware issues.
Before we start
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Unplug power before reseating cables where possible. Avoid damaged cords and bent pins.
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Have on hand a known‑good: power cable (Euro cable), a short USB‑C cable with DisplayPort Alt Mode support, a HDMI 2.1 cable, an Ethernet cable, and access to the display settings.
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Document what you try: which port, which cable, and observed results. If you still need help, this will help us get you what you need faster.
What to try
Look through the symptom list below and start at the symptom that best matches your situation. Follow the steps in order. If an earlier step resolves the issue, you can stop there.