Internet problems can originate from your device, your router, your Internet Service Provider, or the website you're accessing. Methodical troubleshooting—checking connection status, restarting devices, testing different networks—helps identify the root cause and solution.
From your understanding of how internet connectivity works — device, router, modem, ISP, and the wider internet — you already know the chain of systems your data travels through. When something breaks, the key insight is that this chain has distinct segments, and each segment can fail independently. Diagnostic thinking means isolating which segment is the problem, rather than randomly restarting things and hoping one restart fixes it.
Start with the simplest test: can multiple devices access the internet? If your phone works fine but your laptop cannot connect, the problem is in your device — not your router, not your ISP. Check whether WiFi is enabled, whether you are connected to the right network, and whether your device's network settings have been changed. If no devices can connect, the problem is upstream of all of them. The next question: can you reach your router? Disconnect from WiFi and use an ethernet cable directly from the router to your laptop — if this works, your WiFi is the issue (restart the router). If ethernet also fails, the router itself or your ISP connection is broken.
The restart sequence exists because network devices accumulate state — IP address leases expire, firmware gets into inconsistent states, memory fills up — and powering off clears all of that. The correct sequence matters: turn off your modem first, then router, then devices. Wait 30 seconds for the modem to fully clear. Power on modem first, wait for it to connect to the ISP (usually 1–2 minutes), then power on the router, then reconnect your devices. Restarting in the wrong order, or not waiting between steps, can result in the router acquiring a stale configuration.
When the hardware restart does not help, narrow the problem geographically. Visit a website like downdetector.com (or simply search "[website name] down") to check if the site you're trying to reach is having widespread problems — if so, this is not your issue to fix. Run a speed test to confirm your connection is actually reaching the internet. If speed is near zero despite a successful connection status, your ISP link may be throttled or disrupted — contact your provider with this evidence. If speed is normal but specific sites fail, the problem may be DNS (your device's ability to translate names like "google.com" into IP addresses); switching to a public DNS server (such as 8.8.8.8) is a quick diagnostic test. Each of these steps rules out one layer of the chain, systematically converging on the true cause.