ZyXEL Communications G-2000s ユーザーズマニュアル

ZyAIR G-2000 Plus Quick Start Guide 

21 

7 Troubleshooting 

Make sure you are using the correct power adaptor and the power adaptor is plugged into an appropriate 
power supply. 

The PWR and/or 
SYS LED are off. 

Make sure you are using the correct power adaptor and the power adaptor is plugged 
into an adequate power supply. 

 

Turn the ZyAIR off and on. If the error persists, you may have a hardware problem. In 
this case, you should contact your vendor. 

The LAN LED is 
off. 

Check the cable connection to the ZyAIR LAN port. 

Make sure your computer’s network card is working properly. 

The ZyAIR LED is 
off.   

Turn the ZyAIR off and on. If the error persists, you may have a hardware problem. In 
this case, you should contact your vendor. 

Make sure that the access point and the associated computers are turned on and 
working properly.  

Move your computer closer to the access point or the peer computer(s) within the 
transmission range. 

The WLAN LED is 
off. 

There is too much radio interference (for example microwave or another access 
point) around your wireless network.  Relocate or reduce the radio interference. 

Optimize the performance of the WLAN by ensuring that the distance between 
access points is not too far. In most buildings, most WLAN adapters operate within a 
range of 100 ~ 300 feet, depending on the thickness and structure of the walls.  

Radio waves can pass through walls and glass but not metal. If there is interference 
in transmitting through a wall, it may be that the wall has reinforcing metal in its 
structure. Install another access point to circumvent this problem. 

Floors usually have metal girders and metal reinforcing struts that interfere with 
WLAN transmission.