Troubleshooting
Slow Wi-Fi? Find Out Whether It's Your Device, Wi-Fi, Router or ISP
Three quick tests isolate why your Wi-Fi is slow: one device or all, wired or wireless, near or far. Then the fix for each cause, before you pay for anything.
Section
Troubleshooting
Symptom-first guides that help you work out whether a problem is your device, your Wi-Fi, your router or your internet provider — before you change anything.
Start here
Understand
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Explainer Troubleshooting
Router Lights Explained: What Orange, Red and Blinking Mean
What the coloured and blinking lights on NETGEAR Orbi and ASUS ZenWiFi routers mean, why colours differ between makers, and what to do when one says no internet.
Fix problems
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Troubleshooting
Cable Modem Keeps Disconnecting? Check the Line, Then the Signal Levels
Why a cable modem keeps losing its connection, how to read its signal levels, how to rule out your own wiring, and what to give your provider.
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Troubleshooting
Can't Connect to Wi-Fi? Network Missing, Wrong Password or Won't Join
Why a phone, laptop or smart device won't join your Wi-Fi - network missing, password rejected or joining fails - and the fix for each symptom.
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Troubleshooting
Chromecast or AirPlay Not Showing Up? Why Casting Fails on Some Networks
Why your phone may not find a Chromecast, AirPlay TV or speaker: different networks, guest networks and AP isolation, and how to fix it without undoing your setup.
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Troubleshooting
Ethernet Stuck at 100 Mbps Instead of 1 Gbps: How to Fix It
Why a wired connection shows 100 Mbps instead of 1 Gbps, what Intel's guidance says to check, and how to find the weak link one step at a time.
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Troubleshooting
Old Devices Won't Connect After a Router Upgrade (WPA3, Wi-Fi 7 and MLO)
New phones join your new router but the printer, smart plug or old laptop won't. Why WPA3 and Wi-Fi 7 settings can lock older devices out, and the fixes in order.
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Troubleshooting
Printer Keeps Going Offline? How to Fix the Network Side
Why a Wi-Fi printer can show as offline on Windows or Mac: separate networks from extenders or guest Wi-Fi, restarts, and a changing address, and how to fix each.
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Troubleshooting
Router Keeps Rebooting or Overheating: Causes and Fixes
Why a router restarts on its own, from power supply and heat to firmware and a scheduled auto reboot, and the order to check them in before replacing it.
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Troubleshooting
Wi-Fi Connected but No Internet: How to Find the Cause
Your device shows a Wi-Fi connection but nothing loads. Two quick tests show whether it's an outage, the modem or router, or the device.
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Troubleshooting
Wi-Fi Dead Zones: Diagnose the Cause Before You Buy Anything
Find out why a room has weak Wi-Fi, from router placement and bands to walls, interference and the device itself, and fix the free causes before buying hardware.
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Troubleshooting
Wi-Fi Keeps Disconnecting: A Step-by-Step Diagnosis
Two questions narrow down why Wi-Fi keeps dropping: one device or all, Wi-Fi or internet. Then fixes from power settings and drivers to band steering and radar.
Topics we cover
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Wi-Fi performance problems
Diagnosing slow Wi-Fi by isolating device, Wi-Fi link, router, and ISP — before changing hardware.
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Connection drops
Wi-Fi and internet disconnections — device power management, drivers, interference, band steering, router faults and ISP issues.
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Can't connect to Wi-Fi
Devices that never join the network — network not showing, wrong password, authentication and compatibility failures.
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Printers on the home network
Keeping network printers reachable: addressing, bands, guest networks and sleep settings.
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Wi-Fi connected, no internet
Devices that stay connected to Wi-Fi but can't reach the internet — outage vs router vs device, IP address and DNS failures, captive portals.
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Router hardware problems
Routers that reboot, overheat, or fail under load — distinguishing hardware faults from firmware and power issues.
Recently published or updated
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Troubleshooting
Cable Modem Keeps Disconnecting? Check the Line, Then the Signal Levels
Why a cable modem keeps losing its connection, how to read its signal levels, how to rule out your own wiring, and what to give your provider.
Published
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Troubleshooting
Printer Keeps Going Offline? How to Fix the Network Side
Why a Wi-Fi printer can show as offline on Windows or Mac: separate networks from extenders or guest Wi-Fi, restarts, and a changing address, and how to fix each.
Published
-
Troubleshooting
Ethernet Stuck at 100 Mbps Instead of 1 Gbps: How to Fix It
Why a wired connection shows 100 Mbps instead of 1 Gbps, what Intel's guidance says to check, and how to find the weak link one step at a time.
Published
-
Troubleshooting
Chromecast or AirPlay Not Showing Up? Why Casting Fails on Some Networks
Why your phone may not find a Chromecast, AirPlay TV or speaker: different networks, guest networks and AP isolation, and how to fix it without undoing your setup.
Published