Slow Internet

[chuggitt]

I usually get 250Mbps down but a few hours ago it dropped to about 30Mbps.  I looked at my Arris 6580 modem and it looks like there is an issue with channels 2,3 and 4.  I've already power cycled the modem and reconnected the coax.  Any ideas what would cause what I'm seeing and could this be a reason for my slow internet speed?

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Corrected	Uncorrectables
1	Locked	QAM256	21	525000000 Hz	-3.0 dBmV	38.2 dB	0	0
2	Locked	unknown	17	495000000 Hz	-41.9 dBmV	0.0 dB	0	0
3	Locked	unknown	18	507000000 Hz	-27.0 dBmV	0.0 dB	0	0
4	Locked	QAM256	19	513000000 Hz	-16.6 dBmV	30.6 dB	1826	0
5	Locked	QAM256	20	519000000 Hz	-8.5 dBmV	36.5 dB	0	0
6	Locked	QAM256	22	531000000 Hz	-1.2 dBmV	39.0 dB	0	0
7	Locked	QAM256	23	537000000 Hz	-0.2 dBmV	39.3 dB	0	0
8	Locked	QAM256	24	543000000 Hz	0.3 dBmV	39.4 dB	0	0

[EG]

First. Try power-cycling / rebooting the 6580 to see if it will range for and lock on to a new / different set of possibly cleaner downstream channels.

[chuggitt]

I've already done a soft and hard power cycle and nothing changed.