Service Guide
Page 149
... one until the failure point is discovered. 6. Connect an external monitor to correct the problem. 1. Disconnect power and all external devices including port replicators or docking stations. On this model). Reconnect the power and reboot the computer. 4. Drain any memory cards and CD/DVD discs. If the Issue is still not resolved...
... one until the failure point is discovered. 6. Connect an external monitor to correct the problem. 1. Disconnect power and all external devices including port replicators or docking stations. On this model). Reconnect the power and reboot the computer. 4. Drain any memory cards and CD/DVD discs. If the Issue is still not resolved...