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9
Diagnostics
The Cable Modem has five status LEDs for diagnostics. You can monitor the LEDs
during installation and when you are using.
Table 1 shows Cable Modem status LEDs and identifies what each LED light means.
This table will help you to diagnose problems.
Function Color Definition
Power Green - dark for power off
- solid for power on
Cable Green - dark for no downstream RF carrier present or power off
- flashing slowly for downstream RF carrier present and
ranging in progress
- flashing fast for registration in progress
- solid for the Cable Modem registered and ready to
transfer data
PC Green - dark for no Ethernet carrier present or power off
- solid for Ethernet carrier present
Data Green - dark for no user data going through the Cable Modem
or power off
- flashing for user data going through the Cable Modem
Test Amber - dark for initial self-test of the Cable Modem OK or
power off
- flashing for initial self-test of the Cable Modem in
progress or software down loading of the Cable
Modem in progress
- solid for self-test failure of the Cable Modem
Table 1 Status LEDs