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Fault diagnosis

Answer a few questions to narrow down the cause. The steps follow the order technicians actually use: rule things out from the outside in, from cheap to expensive.

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What to do

Faulty display port or cable

  1. Try another cable before concluding — cables fail most often
  2. On multi-port machines, the BIOS may set which port has boot priority
  3. Use the working port for now and reorder the priority in the BIOS

Need someone to take a direct look?

Describe the symptoms and what you have tried — an engineer will call back to help.

Your selected configuration
Symptom: Faulty display port or cable

We only use this number to answer your request.

Before opening the machine. Disconnect power, wait for capacitors to discharge, and photograph the current wiring. If the machine is under warranty, call us first — opening it yourself may void the warranty.