Router won't turn on
Can't get your router to turn on? Please read on...
Clean the fan
If your router does not turn on, it may have overheated. This could indicate that the fan requires cleaning.
Replace the fan
The fan could have been broken. Follow this guide to replace the fan.
Check the power supply
If your router does not turn on, make sure the power cord is plugged in to a wall outlet. If that is not the issue, you will need to replace the internal power supply.
Wireless will not connect
If you attempt to make a connection but cannot find the AirPort.
Check LED lights
If you can't connect to your WiFi make sure that your LED lights are blinking green. Locate the Gigabit WAN port; it is the port directly above the power cord connection on the back of the device. If the light is orange, you will need to check the modem.
Check wireless setting on device
Check if your WiFi connection is turned on. Check if your password is typed in correctly.
Perform a Power recycle
Power down the modem, the Airport Extreme Base Station (AEBS), and the computer(s); wait at least 10-15 minutes. Power-up the modem; wait at least 10-15 minutes. Power-up (plug into power) the AEBS; wait at least 10-15 minutes. Power-up the computer; it should now have Internet access.
Perform a Hard reset
First, unplug the Extreme. Then using a paperclip or similar object, depress the reset button, and plug the Extreme back into power. Keep the reset button depressed until the status light on the Extreme starts flashing rapidly; then release the reset button.
Check the access privileges
If encryption on the network has been enabled, verify that the router has been set up properly. Check the documentation that came with the product and ensure that the you are using the correct password and settings. If you are using a network secured by access control, verify that the MAC address is registered with the network administrator. Call the network administrator for further help with access.
Check if your ISP is working
When the Internet Service Provider (ISP) is down, you won't be able to connect to the Internet. To verify that the problem is with the ISP and not with the AirPort Extreme, use a web browser on another computer that is directly connected to the Ethernet. If you can't connect to the Internet with the other browser, restart your modem. If you still cannot connect, then the problem probably is with the ISP. If this is the case, you can either consult your ISP or wait for the service to return.
Update your software and firmware
If you use a Wi-Fi base station, use the following link to check for available updates; download the software utilizing the instructions provided.
If you use a third-party wireless router, check the manufacturer's website for firmware updates on your respective model.
Check if network card is broken
If the router will not connect after attempting those techniques, you may have a bad network card. To replace the network card, you will need to replace the logicboard. Please follow the appropriate guide.
Wi-Fi Connection is slow
Is your WiFi connection slow? Please read on...
Check Distance from router
Make sure your laptop or cellphone is close enough to receive a signal. Metal surfaces between the router and your computer/phone can interfere with and weaken the wireless signal.
Check Wi-Fi protection
Keep your Wi-Fi protected with a password. Other people using network bandwidth is the main cause of slow internet connections. A password prevents other people from using your network and slowing down your connection speed.
Router won’t remember settings after being unplugged
"Settings are disappearing after a power outage."
Replace the CMOS battery
The CMOS battery is responsible for saving all the router settings. When this dies out, you must replace it.
Check the antenna
The antenna might be lose or broken. Replace it by following this guide.
USB connection not working
Check the USB cable
The USB cable which you are trying to connect is probably broken. Try to move the USB connector to see if it is loose. If it is, then try to replace the USB port on the logic board.