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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 and plugged back in, but no change. I tried another outlet, no change. BTW there are other things plugged into the surge protector outlet where the modem was plugged into and all of those things are operating. I then called Comcast who could not reach my Modem. I then tried to reset the modem to no avail. Comcast is sending a technician over later this week. My question, is there any reason that all lights would flash or that the power light would not turn steady green unless there was an issue with the modem itself? Don't want to pay Comcast $70 to tell me I have a bad modem.
3 Replies
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.
Comcast came by and had to redo some of their lines and also dropped me a new cable to my modem, so they will not charge me for a service call. As suspected the modem was fried and have ordered a new one on Amazon as suggested. I think safe to say when everything is flashing including the power light you have a bad modem. Thanks for the help.
