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Comcast cable modem's lights blink despite PC being idle/off.

Why do some of the lights on my Comcast cable modem blink even when my PC is idle or turned off?

  • Many cable modems have an LED labeled Cable or Data.

  • This LED flashes or blinks even when your PC is idle or turned off.

  • Legitimate network data (most often DHCP and ARP traffic) is generated by Comcast, causing this behavior.

  • This traffic should not be cause for worry, and should not affect your bandwidth.

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Type:ArticleContent
Updated at:26 Jul 02:49
Updated by:Seema
Tags:
Keywords:Comcast cable modem'slights, lights blink, blink despite, blinking light, lights cable, cable modem activity,
Brand: Topic > Troubleshooting
Article Source > Authored in Zolved
Brand > Comcast