ZyXEL Communications P-2900-4HB User Manual

P-2900-4HB User’s Guide

This chapter offers some suggestions for solving problems you might encounter. 

None of the LEDs turn on when you turn the power on.

• Make sure that you use the included power adapter to connect to the ZyXEL 

Device and that it is plugged into an appropriate power source.

• Check all cable connections. If the LEDs still do not turn on, you may have a 

hardware problem. In this case, you should contact your local vendor.

Cannot access the Internet.

• Check the condition of the coaxial cable connected to the back of the cable 

modem. If the cable looks to be in poor condition, replace it.

• Check with your cable service provider if one of the PWR, DS and US LEDs is 

not steady on.

• Check with your cable service provider if the ONLINE LED is off or blinking 

slowly.

• Make sure your computer is configured correctly for TCP/IP networking(see 

Setting Up Your Computer’s IP Address in the Quick Start Guide).

• Make sure your computer can communicate with the ZyXEL Device (either 

through the LAN or the USB port). Use ping to check the connectivity. If you 

cannot ping to the ZyXEL Device, do the following:

• Use  the  arp -d command to delete the existing Address Resolution Protocol 

(ARP) table. Then try to ping to the ZyXEL Device again.

• If you want your computer to use a private IP address, make sure your 

computer is configured as the same network as the ZyXEL Device’s LAN.

• If you want your computer to use a public IP address, make sure it is in the 

same network as one of the ZyXEL Device’s WAN static IP.