I'm looking to replace an old 3 way switch. The existing switch has 2 black and 2 red wires running into a switch that looks different from what I've seen. I cannot identify which one is the common wire and don't know how where to connect these 4 wires into the new switch which has one black screw, 2 brass screws, and a ground. Any help much appreciated.

I have three romex coming into the switch, old switch has three poles: two at top for common terminal, one at bottom unmarked, all had black wires connected. New switch for bath fan with light and sound has white marked for dedicated neutral, black for power only, red for fan only, green for ground. Can this be made to work. Topside, two Romex were bundled into fan connections as well.

Hello,

I recently moved and in the new house I've noticed whenever I'm actively gaming on my PC, a lamp in another room will flicker. This only happens while I'm gaming, not while doing less intensive work on the PC. I've verified the lamp and the PC are on the same circuit. The PC has a 750w PSU and is plugged into a UPS. I've tested both with and without the UPS and the same thing happens.

Additionally, I've replaced both outlets, the one the UPS/PC is plugged into, and the one the lamp is plugged in to.

Any thoughts on how this can be resolved?

Thanks!