Hi,

I have just moved into a house which has a Virgin Media Hub, the hub has a Ethernet cable going into a Ethernet port in the wall. The house is wired with Ethernet ports in each room which all run down into what looks like a patch unit. From there the cables go into a tp link 10/100mbs unmanaged switch. If I connect an Ethernet cable to any port in the house I was getting 98mbs down which is pretty much what we were paying for. Now I upgraded my internet to 350mbps down so I thought it was just a matter of replacing the switch with a unmanaged gigabit switch so I purchased a netgear and two tp link switches and none of them work. I connect them up the exact what the current white tp switch is setup with the same cables and new cat 6 cables but no luck. The ports in all the rooms just go dead. Am I missing something? Please find links below.

LS 1008 currently fitted I tried to replace it with

LS 108G which did not work then tried 

TL-SG108S which also did not work