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Forum Discussion
CM500 Modem has all lights flashing after storm even power light.
While out yesterday a storm hit with lightening and on my return my internet was down. On checking my CM500 Modem all lights were flashing rapidly off and on. I unplugged my modem for 30 seconds an...
One thing you could try before comcast comes.
Unhook your coax cable from the modem. with it powered on, hold the reset button until the lights change. Might be up to 30 seconds. If you can't get the lights to change and they just stay flashing, probably a bad modem. the others devices might be fine but there might have been a surge in the coax line that caused it and why it only effected that device.
The cm500 is usually around $55 on amazon ($45 if you can get it on sale) so its cheaper to replace it and then have comcast visit if it doesn't fix the problem.
Thanks, As suggested i tried holding down the reset with the coax off for over 30 seconds, and absolutely nothing changed on the modem. I had not considered the surge coming from the Coax. I also had a GCI outlet trip during this time as well, so I’m confident there was some significant lightning.