Connectivity
Connectivity and managing Your Comcast Business network
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Only one light on

What would be the cause for only the power light being on my business modem and no other lights?  I know when I lose connection, more lights are on than just the power light.  All the lights were off except for the power light.  This went on for hours.  I then decided to unplug it and plug it back in and all the lights came on.  Should I be concerned that I have a faulty modem?

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Re: Only one light on

Can also be a symptom of an intermittently failing power supply (power adapter in the case of the SMC/Netgear devices). If a good UPS doesn't solve it, I would recommend looking into that.

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Re: Only one light on

The most likely answer is that your modem is ok but was confused by a power glitch. This is especially likely if you do not have the modem powered through and Uninterruptable Power Supply (UPS).

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Re: Only one light on

Can also be a symptom of an intermittently failing power supply (power adapter in the case of the SMC/Netgear devices). If a good UPS doesn't solve it, I would recommend looking into that.

View solution in original post

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