Motorola SBG900 looses internet connection

SOURCE: Re-starting a ARRIS modem after a loss of power

You can try doing a "Hard reset" on the modem but it looks like you've tried most combinations. To do the hard reset: - unplug the coax cable from the back of the modem - Push and hold the "reset" button in for 15 seconds - Allow the modem 30 seconds to reinitialize and then plug the coax cable back in. Within 10minutes you should have activity back. If not, the modem needs to be replaced. I know you may have tried something similar to this but I'm hoping this may help.

SOURCE: losing connection

I assume this is a cable modem? You need to call your cable company and have a trouble ticket created. I worked for the cable company installing cable for quite a while and I bet my paycheck the signal getting to the modem are below specs and that's why the modem gets dropping the internet connection.

Hope this helps.

SOURCE: Online problem with motorola SBG900

hardwire the modem with the acer computer and shut both the modem and the computer down..then turn on the modem ..wait for a minute and then turn on the computer..just check whether the status still says local or not.....remember this is the first step..if it doesnt work,,keep me infmd,,i will be back with u

SOURCE: Arris cable modem

if the power light is flashing then the modem is on battery backup and internet is disabled. plug the power cord into the modem or find a working power outlet, you should be set after that.

Power light flashing=bad

SOURCE: My modem keeps losing internet connection

Update your drivers and then do a speed test. Most isp send updates to the subscribers when they update, yours may not. Don't forget to check all of your connections before wasting time calling your isp. I trust this test the most. Rember you don't always get what you pay for.
http://www.speedtest.net/