XPS 9370/9380/7390: Thunderbolt 3/USB Type-C connections can fail when too many external devices are attached
Summary: Information about why your XPS 9370/9380/7390 notebook may lose a USB Type-C/Thunderbolt 3 connection and/or not be able to detect/charge any external devices.
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This article is not tied to any specific product.
Not all product versions are identified in this article.
Symptoms
Symptom
You may find that your XPS 9370/9380/7390 notebook will lose a cabled connection and/or not be able to detect/charge any external devices through the USB Type-C/Thunderbolt 3 port.
Affected systems
- XPS 13" 9370 Notebook
- XPS 13" 9380 Notebook
- XPS 13" 7390 Notebook
Cause
None
Resolution
Solution
XPS 9370/9380/7390 notebooks support dynamic power delivery and the power output capability from each port relies on how many external devices you connect to the system and the power they draw.
This is the system working as designed.
(Figure.1 13" Left-Hand Side)
(Figure.2 13" Right-Hand Side)
Affected Products
XPS 13 7390, XPS 13 9370, XPS 13 9380Article Properties
Article Number: 000129204
Article Type: Solution
Last Modified: 30 Apr 2025
Version: 7
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