Start with a clean baseline
Separate the local link from internet reachability and application performance. Wi-Fi marketing speed, Ethernet port speed, ISP speed and browser throughput are different measurements.
Live evidence
Relevant checks
Webcam TestOpen your webcam locally to verify that the browser can access and display a live camera stream.
→Microphone TestCheck whether your browser can detect your microphone and receive live audio.
→Keyboard TestPress keys and verify that the browser receives the expected keyboard events.
→Mouse Button TestVerify left, right, middle, and extra mouse button events.
→WebUSB Device TestRequest a compatible USB device through WebUSB and display the browser-exposed manufacturer, product, vendor, and product IDs.
→First sequence
Do the high-signal checks before risky changes
- 1
Test one downstream device at a time
- 2
Connect the dock's required power supply
- 3
Compare the same peripheral directly to the computer
Decision points
What the result should change
If one client fails, others workPrioritize the client adapter, saved network, cable/port or device policy.
If all clients lose internet but stay associatedPrioritize WAN/modem/DNS/upstream status rather than each device.
If wired is stable and wi-fi is notPrioritize RF placement/interference/channel/client-band behavior.
Browser can help check
- Test many downstream peripherals independently
- Show whether individual browser-level devices work through the dock
Browser cannot prove
- Measure dock power delivery
- Read Thunderbolt link health
- Inspect USB controller topology universally
Repair boundary
Know when to stop browser troubleshooting
- Do not factory-reset a managed or ISP-provisioned router before saving configuration and credentials.
- Do not infer 2.5/10GbE from Wi-Fi class names; verify the exact physical ports.
- Browser Network Information API values are hints and are not a replacement for router/switch counters.
Used-device inspection
What to verify before paying or signing off a repair
- Verify exact WAN and LAN port speeds
- Check Wi-Fi generation/bands supported by your actual clients
- Check mesh/backhaul and VLAN/PoE needs before choosing hardware