3Com HomeConnect Getting Started Manual page 47

All four of the LEDs on the front of my cable modem
are lighted and blinking.
Call your cable service provider or 3Com's technical support
for assistance.
All of the LEDs on the front of my modem look right,
but I still cannot access the Internet.
If the Power, Link Status LEDs, and Data Rate LEDs are
lighted, the cable modem is operating properly. Try
shutting down the computer and then turning it back
on. This causes the computer to re-establish
communications with your cable service provider's
computer.
Power cycle the cable modem by removing the power
adapter from its outlet and then plugging it back into
the outlet. Then try reconnecting to your cable service
provider.
Verify that you have installed TCP/IP properly, and that
the TCP/IP parameters provided by your cable service
provider are correct for your computer.
If you are using a cable line splitter so that you can
connect the cable modem and a television at the same
time, try removing the splitter and reconnecting the
cables so that the cable modem is connected directly to
the cable wall jack. Then try reconnecting to your cable
service provider.
The power on my modem goes on and off
sporadically. The Link Status light never stops
blinking.
You may be using the wrong power adapter. Check that
the power adapter you are using is the one that came with
the cable modem.
Troubleshooting the Ethernet Installation 41