Hello I dont speak German very well so I will try on English. So problem is with router in last year or a little less i keep getting no internet connection or sometimes was slow that i could not load anything. But in last 3 months owner of the router changed modem and replaced with new one to fix the problem but here comes new one even worse.So wifi cutts off time to time and i dont mean it cutta off and comes on again when its down it is down till i dont go and restart the router then it works sometimes 10 hours but sometimes 2 3 even 5 minutes after restarting goes to "No internet access" a tries using troubleshoot few times on laptop but it says "WLAN does not have  a valid IP"  at first i thought problem is in my repeater because internet is on the first floor and I am on the third but even i tried shuting off repeater and connecting directly on router but it seems problem is in router.Later on i figured out that everytime when i connect laptop to router internet instantly goes down power is blinking and everything except DSL and it wont work until I restart the router but then i must disconnect laptop from it. I thought problem is with laptop at first it worked fine without connecting laptop like one day maybe then instantly went again down by itself and this keeps happening like week or two and it is really frustrating i would appreciate if someone knows what is the problem.Service told us they will come in 2 weeks but that is just to long and Internet is not mine it is from elder people but they dont know so it is up to me... Internet just keeps disconnecting by itself and reboot is only option but for how long it works after reboot that is up to router. Thank you