Try the same Wi-Fi on a second device and read the router or modem status lights. If every device is offline, focus upstream; if only one fails, troubleshoot that device first.
Use normal shutdown procedures, keep hardware dry and stop if you see damage, overheating, burning smells or any electrical risk.
Checks to perform in the right order
Start with simple, reversible checks. If one step fixes the issue, stop there instead of changing unrelated settings.
Confirm the exact symptom
Compare at least two devices on the same network so you know whether the outage is local to one client or affects the whole connection.
Start with the simplest reversible check
Read Internet, DSL, fiber or LOS indicators using the exact modem manual and check the provider for a known outage.
Change one variable at a time
If only one device fails, forget and rejoin the Wi-Fi on that device before changing router-wide settings.
Cross-test before resetting anything
Write down what changes and what stays the same. A controlled comparison is more useful than several resets performed together.
Escalate with useful evidence
If the problem survives the safe checks, record the model, software version, warning shown and tests already performed before contacting support.
How to narrow down the cause
- A change after one controlled test is a useful clue; keep the other variables unchanged.
- If a second compatible device works in the same setup, focus on the first device rather than replacing everything.
- Stop if there is heat, liquid, physical damage, burning smell or electrical risk.
Official sources used
Procedures can vary by model, firmware or hardware revision. When your device differs, use the official manufacturer documentation for that exact model.