GUIDED TROUBLESHOOTING
The laptop charges slowly or not at all
Check whether the dock supplies host power, whether it meets the laptop requirement, and what shares the power budget.
This is a proposed diagnostic sequence. Its result identifies a next check; it does not prove a hardware fault.
Checks you can read directly
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Use the laptop’s separate charger
UD-6950H does not charge the host. That is an intended limitation, not a charging fault. If its displays work, the existing dock can remain in use with a supported laptop charger.
Compare delivered host power with the laptop requirement
Check the dock’s cross-brand power limit, adapter variant and host cable rating. Some vendor charging features apply only to that vendor’s laptops. Use a supported separate charger if the documented dock delivery cannot meet the required workload.
Check the Anker 778 shared power budget
The published host maximum is 100 W, dropping to 65 W when both 30 W front USB-C charging ports are in use. Compare after removing those loads, then decide whether a separate laptop charger meets the requirement.
Compare with external charging loads removed
Disconnect optional charging devices and retry the laptop connection under the same workload. Consult the exact dock’s power-sharing table. A change identifies a useful condition to report; it does not establish a failed power supply.
Check the direct charging path
Inspect the supported charger/cable arrangement and the laptop’s charge-management status. Follow the laptop manufacturer’s charging guidance. A failure that also occurs without the dock should be isolated before replacing the dock.
Make one controlled charging comparison
Record charger model, required wattage, workload, warning message and whether the battery actually loses charge. Compare the supported direct charger with the dock under similar conditions.
Use iPad-specific display guidance
iPadOS has different external-window and display-count rules from macOS. The linked guide covers iPad Pro 11-inch M4; confirm the model before applying it to another iPad.
Check the full Galaxy Tab model and DeX support
The Tab S9 and S9 FE have different wired-output support. Use the exact Samsung model and installed software instructions before changing cables or buying a dock.
Identify the device and operating system
Read the full model and OS from the device information or manufacturer label. Windows, iPadOS and Android instructions are not interchangeable.
Primary sources and scope
Sources reviewed 7 September 2026. This flow has not been verified by physical hardware testing. Read each linked model guide for applicability and limitations.
- Microsoft: USB-C troubleshooting in Windows
- Apple: troubleshoot USB-C charging
- Plugable: UD-6950H specifications and limitations
- Dell: cross-brand dock compatibility
- Apple: charging a Mac laptop
- Anker: 778 Thunderbolt dock FAQ
- Apple: iPad Pro 11-inch M4 specifications
- Apple: iPad external-window support
- Samsung: DeX devices and wired connections
- Samsung: external DeX display troubleshooting
- Microsoft: find device model information