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My SURFboard SB4220 or SB5100 cable modem has a flashing Power LED and the other LEDs are solid, is it defective?

April 26, 2017Cable modem flashing LED power sb5100 solid SURFboard

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My SURFboard SB4220 or SB5100 cable modem has a flashing Power LED and the other LEDs are solid, is it defective?

1 Answer

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10 Posted

No. The newest firmware version out for the SB4220 and SB5100 support a feature called NACO (Network Access Control Off). This feature allows the cable provider to easily determine if a cable modem isn’t provisioned properly or has been disconnected due to non-payment. Firmware versions 0.6.3.5 or above for the SB4220, and firmware versions 2.3.0.2 or above for the SB5100 have this feature. This feature has no other affect on normal cable modem functionality; it is only a visual troubleshooting aid.