Fritz! FRITZ!Box 4020 - Troubleshooting Chart

Troubleshooting Chart
Overview
If malfunctions occur, for instance, such that you can no longer access
the user interface of the FRITZ!Box, first try to solve the problems
using the following tables.
Troubleshooting Chart
Error Scenario Cause Solution
LEDs not on Power supply
interrupted
• Make sure the power supply
unit is connected properly.
• Try plugging in a different
device to make sure that the
electrical outlet is active.
Computer’s
wireless LAN
adapter not
ready for opera
tion
Switch on your computer’s wire
less LAN adapter. For details,
consult the manual of your
computer.
Wireless radio
network of the
FRITZ!Box
switched off
When the “WLAN” LED is off, press
the WLAN button on the
FRITZ!Box. Hold it down until the
“WLAN” LED begins flashing.
Computer
cannot find the
wireless
network of the
FRITZ!Box
Enable the “Name of the radio
network visible” function (“Wire
less / Radio Network”) in the
FRITZ!Box user interface.
Cannot establish
a wireless LAN
connection
Incorrect
network key
Enter the correct network key
(“Wireless / Security”).
Malfunctions
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189FRITZ!Box 4020