Earlier today my kitchen light switch fell apart. I picked up a replacement and weird it as best I could comparing the terminals on the old switch
The kitchen has two lights on a 2 gang switch. Now one of the lights is on and off I flip one of the switches it goes out and the other comes on. Second switch does nothing.
There is a red wire, grey, blue & yellow plus a red common wire that was bridged between the two common terminals.
Edit picture added