The last 2 weeks my home network started having loss of signal then dropping the signal and two days ago I lost all signal.  My inital trouble shooting led me to replace my ASUS XT8 with their newer virsion XT9.

Unfortunatley, that didn't solve the problem.  I then replaced my TP-Link SG116 with a TP-Link new SG-608.  Still did not correct the problem.

Digging through my stuff I came across an old (older then both the SG116 and the 608) Netgear SG-608 switch which I decided to try. 

Problem fixed!

Note: The TL-SG608 is not listed as a TP model?