Very slow speed, MDD message timeout, SYNC Timing Synchronization failure - Loss of Sync

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Thanks so much for the responses. There are no splitters. I have the modem directly connected to the one active coaxial in the condo.  Can you give me some ideas on how to "reduce noise" on the channels that have too much of it ?

Naomi

Any ideas on how to reduce noise on those channels? Not sure how to do so but able and willing!
Naomi

If none of those tips helps, then your only choice is to get a tech out to investigate. Good luck !