You replaced your old router with a new one and now there's no internet. The #1 cause: your modem is still locked to the old router's MAC address. Here's how to fix it.
Fix 1: Power Cycle the Modem (Most Important!)
- Unplug the modem from power
- Disconnect the Ethernet cable from modem's LAN port
- Wait 60 seconds (this clears the MAC address lock)
- Connect Ethernet from modem LAN port → router WAN/Internet port
- Plug modem back in → wait 5 minutes for full boot
- Plug in (or power on) the new router
- Wait 3-5 minutes for router to get IP from modem
Fix 2: Use the Correct Ports
Correct Cable Setup:
- Wall outlet → Modem (coaxial for cable / phone line for DSL / fiber cable for fiber)
- Modem LAN port → Router WAN/Internet port (usually yellow or labeled "Internet")
- Router LAN ports → Computers (for wired connections)
Common mistake: plugging the modem into a LAN port instead of the WAN port!
Fix 3: Set Up the New Router
- Connect a device to the new router (WiFi or Ethernet)
- Open a browser and go to the router's admin page:
- Most routers: 192.168.1.1 or 192.168.0.1
- TP-Link: tplinkwifi.net
- Netgear: routerlogin.net
- Asus: router.asus.com
- Linksys: myrouter.local
- Follow the setup wizard
- Choose "Automatic/DHCP" for internet connection type (cable users)
- For DSL users: choose PPPoE and enter username/password from ISP
Fix 4: Match Old WiFi Name & Password
- In router admin → Wireless Settings
- Set SSID (WiFi name) to match your old router's name
- Set the same password
- Set same security type (WPA2/WPA3)
- This lets all devices auto-connect without reconfiguring each one
Fix 5: Clone MAC Address (If Modem Won't Release)
If power cycling the modem didn't work, some routers can clone the old router's MAC:
- Log into new router admin panel
- Find WAN/Internet → MAC Clone option
- Enter the old router's MAC address (printed on a sticker on the old router)
- Save and restart the router
Fix 6: Update Router Firmware
- Log into router admin panel
- Go to System/Administration → Firmware Update
- Click "Check for Updates"
- New routers often ship with outdated firmware that has bugs
- Update and restart
Fix 7: Factory Reset the New Router
- If nothing works, the router may have been misconfigured
- Find the reset button (small hole on back/bottom)
- Hold with a pin for 10-15 seconds until lights flash
- Wait for router to fully restart
- Reconnect and run through setup wizard again
Frequently Asked Questions
Why doesn't internet work after changing my router?
Most common reasons: (1) The new router isn't getting an IP from the modem (modem remembers old router's MAC address — power cycle modem), (2) WAN/Internet port not connected properly, (3) Router needs initial setup (login to admin panel), (4) PPPoE credentials needed (DSL users), (5) Devices trying to connect to old WiFi name.
Do I need to reset my modem when I change routers?
Yes! This is the #1 fix. Your modem usually locks to the first device (router) it sees via MAC address. When you swap routers, the modem ignores the new one. Unplug the modem for 60 seconds, then plug it back in with the new router connected. This forces the modem to accept the new router.
My new router has WiFi but no internet — why?
Your devices are connecting to the router's WiFi (local network works) but the router isn't getting internet from the modem. Check the router admin panel for WAN/Internet status. If it shows 'No IP' or '0.0.0.0', the modem isn't providing internet to the router — power cycle the modem.
Should I keep the same WiFi name and password on the new router?
Yes, highly recommended. Set the same SSID (WiFi name) and password on the new router. This way, all your devices (phones, smart home devices, cameras) will automatically connect without needing to be reconfigured individually.
I changed from ISP router to my own — do I need to call the ISP?
Usually no for routers (only for modems). If you're replacing the ISP's gateway (combined modem+router) with your own modem+router, then yes — you need to call the ISP to register the new modem's MAC address. If you're just replacing the router and keeping the same modem, no ISP call needed.
New Router Still Not Working?
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