TECHNICAL SUPPORT
Cable Modem: Motorola SB5100 Troubleshooting
► Summary
Troubleshooting
Manufacture Resources
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► Troubleshoot Modem Lights
"Activity" light flashing
► Troubleshooting Diagram:
Modem
Status
Problem
Solution
Light
Verify power supply connections and electrical
Off
No power
outlet. Also make sure the outlet is not
connected to a switch.
Power
An error has occurred
Verify coaxial cable connection and try resetting
Flashing
during normal
the Modem.
operation.
Slow
Searching for cable
Verify all cable connections and try resetting
Flashing
connection
Modem.
If this is a new Modem or a replacement Modem,
the customer must contact Suddenlink Technical
Fast
Support with the MAC address. If there are
Searching for cable
Receive
Flashing
several MAC addresses on the Modem, please use
connection
Modem
the "HFC" or "RF" MAC address. View MAC
No connection
Verify all cable connections and try resetting
Off
Cable connection
Modem.
Scanning for the
Verify all cable connections and try resetting
Send
Flashing
upstream frequency
Modem.
Scanning for the
Verify all cable connections and try resetting
Online
Flashing
network connection
Modem.
Activity
Transmitting or
Blinking
No Problem
receiving data
► Back View
► Mac Address Label
