ExpressBox 3T | Chapter 3 Verify Installation
If there is no Display Monitor attached to Thunderbolt™ 2 Interface card it would only show 5 illuminated solid
GREEN LEDs (D3, D4,D6,D7 and D9), this is normal. See FIGURE T2-B below.
If you reconnected an external Display device, LEDs D1 and D5 should come on immediately. Otherwise, the
Thunderbolt™ 2 Interface card is not properly working or the monitor Displayport cable is faulty.
FIGURE T2-B
Thunderbolt™ 2 Interface Card LEDs: Functional Mode - without external display device attached
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