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How to confirm C6300 hardware issues?
How can I confirm if my C6300 AC1750 is having hardware problems?
I started having intermittent internet connection issues around May, approximately two years after I purchased the device. Connection would periodically go out, and come back. This week it was particularly bad. Called the ISP who said they couldn't contact the device. Technician came out, checked all the lines, confirmed the signal is good, and even installed new lines to the drop. Since he installed a T-splitter to knock down the signal to about 5dB, because it was coming in "hot" at around 8-10dB, he was able to monitor it in parallel with a signal meter. Of course then it didn't go down.... All the while he was here he never saw the signal drop out on the meter. He observed that the LED lights on the device went out and came back.
It was ok for a day, then started acting up again. The C6300 periodically resets itself, all the LED's go out, then eventually come back on. And when they're back on, the internet still doesn't work. The reset issue makes me think maybe the power supply is becoming questionable. All the lights on but no internet connection.
I don't have a spare power supply. How can I troubleshoot further to confirm that the C6300 is having hardware issues?
Unexpected intermittent power reset issue confirmed as a hardware problem. Just purchased a new modem router and no further intermittent internet troubles. T3/T4 timeout issues were a byproduct of modem loss of power and reboot, coincidental with power reset events. New modem has had no T3/T4 timeouts in the event log.
9 Replies
Have a friend, family member or neighbor you can take the modem to and test at a different location?
Thanks, but since the ISP needs the MAC address of the device it's a bit difficult to just try it at another location, with same ISP
I've noticed that each time the internet drops out that all the LED lights go out on the front panel of the C6300. Then, they gradually come back on, and then the spotty internet connection persists.
Around the time of the device reset, the Event Log has this entry:
No Ranging Response received - T3 time-out Doesn't seem like a T3 timeout should cause the device to spontaneously reset.... In my experience with embedded controls, spontaneous resets are caused by software bugs, or looming hardware failure. Something in the line, or signal, shouldn't cause a downstream device reset.
If there was a bug in the firmware, I'm sure lots of people would be affected and Netgear would issue an update. So it's probably not a bug. Based on my experience I'm tending to think sudden reset of the C6300 is caused by either power supply problem, or modem/router electronics problem.
Signals seem to look good, when the internet is working. And when the internet isn't working, the router also doesn't seem to be working, takes a bit to reboot and all lights to come back online with connection to 192.168.0.1 restored. At which point the signals look fine again.
Rnaging issues are mostly a ISP line signal issue.
Can try to find a differnt power supply. Get a different modem and see if this different modem does the same thing or not.
