Internet Drops After a Power Outage: What to Check First
First 100 Words Quick-Fix/Triage
Check this first: confirm your modem, router, gateway, or ONT has power and the cables are still firmly connected.
If the power is back but internet drops after a power outage, check your provider outage status using mobile data before changing settings.
Do not factory reset your router yet.
If you have a separate modem and router, restart the modem first, wait until it looks online, then restart the router.
Contact your provider if the modem, gateway, or ONT will not come online, the online light stays off, or direct Ethernet still fails.
What this symptom usually means
A power outage can shut down every part of your home internet setup at once.
When power returns, your modem, router, gateway, mesh system, or ONT may not reconnect in the right order. Sometimes the device has power, but the internet connection has not returned yet. Sometimes the router starts before the modem is ready. Sometimes the problem is not inside your home at all.
After storms or wider outages, your provider may still be repairing the line, pole, fiber feed, local cabinet, or account-side connection. In that case, restarting your router will not fix the service by itself.
This does not mean your router is broken.
Start with free checks. Check power, cables, outage status, restart order, and device lights before you reset anything or buy new hardware.
Step-by-step troubleshooting checklist
Step 1: Check whether power has fully returned in the room where your modem, router, gateway, or ONT is plugged in.
Step 2: Check the wall outlet, power strip, surge protector, and breaker if any networking device has no power.
Step 3: If you have fiber and an ONT, check whether its power supply or outlet is working. If it uses a GFCI outlet, check whether the outlet tripped.
Step 4: Check that the modem, gateway, router, and mesh power cables are firmly connected.
Step 5: Check that the coax, fiber, Ethernet, or provider cable has not come loose.
Step 6: Use mobile data to check your ISP outage page or app.
Step 7: If your provider reports an outage, stop changing settings and wait for service restoration.
Step 8: If there is no reported outage, restart your equipment in the correct order.
Step 9: If you have one gateway, unplug its power, wait 30 to 60 seconds, then plug it back in.
Step 10: If you have a separate modem and router, unplug both devices.
Step 11: Plug the modem back in first and wait until it looks online. Light names and colors vary, so check the label, app, or manual if unsure.
Step 12: After the modem looks online, plug the router back in and wait a few minutes.
Step 13: If you use mesh, restart the main router or gateway first, then restart mesh nodes after the main connection returns.
Step 14: Test Wi-Fi on one device and Ethernet on one wired device if possible.
Step 15: If direct Ethernet from the modem or gateway still fails, stop treating this as only a Wi-Fi issue.
Only run a direct Ethernet test if your setup allows it. Do not unplug, open, or change provider-owned ONT equipment unless your provider instructions allow it.
What your results mean
If the internet comes back after the correct restart order, do not keep changing settings. Your equipment probably needed a clean startup after the outage.
If the modem or gateway cannot get online, the issue is usually beyond normal Wi-Fi troubleshooting.
If Ethernet works but Wi-Fi still fails, the internet line may be active, but the router Wi-Fi, mesh, or device connection still needs attention.
What not to do yet
Do not factory reset your router, modem, gateway, or mesh system as the first fix.
A factory reset can erase your Wi-Fi name, password, admin settings, ISP-specific setup, PPPoE login, VLAN settings, IPTV settings, or other configuration details. Those details vary by provider and device.
Do not change DNS, DHCP, WAN, bridge mode, passthrough mode, or mesh settings during the first recovery attempt.
Do not buy a new router or modem yet.
Power outages can cause real equipment damage in some cases, but replacement should come after basic isolation. A loose cable, tripped outlet, provider outage, failed power adapter, or ISP-side fault can look like a broken router.
Do not assume every LED color means the same thing on every device.
Light names and colors vary by modem, router, gateway, mesh system, and provider equipment. Treat lights as clues, not universal proof.
When to contact your provider
Contact your provider when the problem points past your router.
That includes:
The modem, gateway, or ONT will not come online after power returns.
The online or internet light stays off or keeps blinking after the device has had time to start.
Your provider app or outage page shows a service problem.
Direct Ethernet from the modem or gateway still fails.
Fiber ONT power or status looks abnormal and the accessible outlet checks do not fix it.
Internet, TV, or phone service all fail after the outage.
Before contacting support, write down:
When the outage happened.
Whether power is fully back in your home.
Whether the modem, gateway, router, or ONT has power.
Which lights are on, off, or blinking.
Whether Ethernet works.
Whether Wi-Fi is the only thing failing.
This helps support decide whether the problem is inside your home or on the provider side.
Related HomeNetCompass guides
For the correct restart order, read Modem or Router First? The Right Restart Order When Internet Fails.
For repeated disconnects after power returns, use Internet Drops Randomly: Router, Modem, Wi-Fi, or ISP?.
If your router internet light is off or red after the outage, read Router Internet Light Is Off or Red.
FAQ
Why does internet drop after a power outage?
Internet can drop after a power outage because the modem, router, gateway, ONT, or provider equipment may not reconnect cleanly when power returns. The issue can also be provider-side if lines or local equipment are still being repaired.
Should I reset my router after a power outage?
Restart it first. Do not factory reset early. A normal restart should not erase settings, but a factory reset can erase Wi-Fi and provider-specific configuration.
Should I restart the modem or router first after a power outage?
If you have separate modem and router boxes, restart the modem first and wait until it looks online. Then restart the router. If you have one gateway, restart that one box.
What if my ONT has no power after an outage?
Check only accessible power items such as the outlet, power cord, or tripped GFCI outlet. Do not open or change provider-owned equipment. Contact your provider if the ONT still has no power or abnormal status.
When should I call my ISP?
Call your ISP if the modem, gateway, or ONT will not come online, direct Ethernet still fails, the provider app shows an outage, or internet service stays down after the safe restart sequence.
Final takeaway
If internet drops after a power outage, start with power, cables, outage status, and the correct restart order. Do not factory reset first. If the modem, gateway, ONT, or direct Ethernet test still fails, stop changing settings and contact your provider.