Ethernet Cable Video Extender Problems?

The extender adapters should easily convert to handle USB. Video is not as easy.The slightest thing can upset the signalling. And a reduction in voltage over the line will cause a monitor to drop out.The cables need to be unshielded twisted pair or shielded with ONE end shield grounded. and forget the fancy testers, I have seen them pass cables to Gb performance, but they won't run a simple phone due to load if the connections are not correctly made. Monitors are quite a load and an insecure crimp will seriously affect performance on a cable which will run correctly for networking. Bad quality RJ45 connectors, using the incorrect crimping or IDC tool (there are 3 types of IDC connectors) or just a worn crimping tool can cause these problems. And if ANY other cable running parallel has a problem it can affect all cables in the vicinity. Also if a trunk, rack or tube runs parallel and close enough to a mains power cable it can induce high voltages. I have powered a 110v bulb from a CAT6 cable this way to demonstrate the problem. That circuit running 2 tubes side by side (240v in one CAT6 in the other) had actually destroyed a �7,000.00 UK machine.