I just plugged my router into an extension cord then my display in the computer suddenly went down for about a second then went back just like normal. I doesn't always happen but when you plug something that is connected to the computer(router, speaker, etc.) the computer display turns off for a second. The computer is plugged in the AVR together with the monitor and the rest are plugged else where. Router is plugged on a different extension cord than that of the speaker, printer and modem. The computer is fairly new and I wanted to ask if it would affect something in the long run.