So I had my system at my house working just fine, the router is away from anyone, it was just perfect. Then just this monday stopped working! What gives? What can I do to get the router working again? The router was connected, electric power connected, like aways. I borrowed a friends system (same system), and it just worked fine.
None of the lights of the router go on, they are off. Even when connected. What do you recommend?
Thanks,
I suspect your referring to your Internet Router, and not a SmartThings hub? This may not be the best forum to get assistance on…
If its a SmartThings issue you are experiencing—please contact support@smartthings.com as they should be your first stop! 
Hi Ivan … sorry to hear you have troubles!
I presume you are referring to the SmartThings Hub (not a wifi router):
Unplugging and plugging it in again is always the first step.
Next: email: support@smartthings.com – they are the experts.