Question Wired ethernet connection stopping router wifi

Mar 24, 2020
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We have used a Netgear16 router for a long time for wifi in our house. If I use a wired connection from router to laptop, it works fine. However I wanted wired to basement so connected router by ethernet cable to cat6 wall Jack connected to basement wall Jack. When I plug ethernet cable from that Jack to computer, the wifi stops working from router for everything. Unplug cable from computer and wifi works again. Checked wall jacks and the were in A configuration. Changed to B and same result. I believe this should be a straight passthrough like a long cable. Why would it kill the wifi? Oh and neither worked on the computer either. What am I missing?
 

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