I have the G3100 Router and 2 G3200 Extenders in a 3 floor home. Main router is in basement and one extender on the 1st floor and the other on the second floor. I set up correctly and all were working fine for about a week or so. Yesterday the 1st floor extender started with a fast blinking yellow light which indicates that it is too close to the main router or poor wireless connection according to the color code key. It then goes to white solid after a few minutes. Happens constantly now. The 2nd floor extender stays solid white while this is happening. The main router is connected via coax and the others are wirelessly connected to main. Would switching each extender to coax fix this?Any suggestions?