Precision 15 and 17 7xxx Computers Encounter Power Error Message with Thunderbolt Docks
Summary: This article describes power requirements for Precision 15/17 7xxx computers, and Thunderbolt docks to resolve any power-related error messages you may observe.
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This article is not tied to any specific product.
Not all product versions are identified in this article.
Symptoms
Precision 7xxx computers encounter power-related error messages when insufficient power is provided to the system.
The docks are:
- WD15
- TB16
- WD19
- WD19S
- WD19TB
- WD19TBS
- WD22TB4
Cause
Precision 7xxx computers require both the dock to have a 240w AC Adapter connected plus the AC Adapter that shipped with the computer connected to the computer directly, as supplementary power.
Resolution
To resolve this power-related issue, connect the AC adapter that comes with the Precision computer along with the Thunderbolt dock.
Affected Products
Dell Dock WD15, Dell Thunderbolt Dock TB16, Dell Dock WD19, Dell Dock – WD19S, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS, Precision 7520, Precision 7530, Precision 7720, Precision 7730, Precision 7510, Precision 7710
, Dell Thunderbolt Dock – WD22TB4
...
Article Properties
Article Number: 000124228
Article Type: Solution
Last Modified: 14 Nov 2025
Version: 9
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