Hello.  I recently upgraded my AC1750 to a the AX300.  I copied over all the router settings, and every connected device worked fine except for my office PC, which is connected via a 100ft Cat5 cable.  I swap back and forth between the 2 routers, and the PC works fine with AC1750, but cannot connect with the AX300.  The 2 network lights on the back of my PC will not even light up when the new router is used.

Are there any settings in the new router that would control the power on the wired networks?  Do you think upgrading to a new cat6 cable would help?  I really like the Wi-Fi range improvement with the AX3000 so I would hate to switch back to the old AC1750.

Thanks.