Hello community ! i create this post to find a solution about my problem. that makes 1 year i have built my portable wii but it happens it freeze in games or randomly. i looked on the USB differential pair and i try to shield it with an GND cable roll up but no effects. maybe it is related to 90ohms impedance ? The cable losing the referential of the internal ground plane would suffer a random disturbance? do you have this problem too?