|Ok, with only 1 and 2 plugged in, plug only 3 in. What happens?|
With only 1 and 2 plugged in, plug only 4 in. What happens?
If one of the two causes your internet to stop working, you'll know which one is your problem.
If the internet still works, redo the above only this time plug 4 in after 3. This should cause a loss of internet. If it does, unplug 3 and 4 (get internet working again) and then reverse the order and see what happens.
If you consistently lose the internet when plugging 3 and 4 in at the same time, but don't singly I would then unplug 1 and 2 and see what happens with just 3 and 4.
I suspect this is a conflict between devices or one bad device affecting all others which is why I wanted you to do the above to help figure out what is the problem device(s).
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.