Pedals cutting the sound (haunted house?)

Hoping I can find some trouble-shooting ideas since I ran out.

The problem: When I step on a pedal (turn it on) it cuts my sound off. Just like stepping on a tuner cuts the sound, except it happens regardless of the pedal (I tried 4 different pedals).

After testing all the cables (all good) on my board, I decided to just try one pedal at a time. All with the same result. I simplified the signal chain to bass-cable-pedal(pick one)-cable-amp. I activate the pedal, any pedal, it kills all the sound.

I used different basses, amps, pedals, cables, power supplies, pedal combinations and 9v batteries. I am truly baffled.

Any ideas? Or should I have my house cleansed of demons?

 

All TS cables. As far as LED pedals go -- when the LED is on, the sound is off. When the LED is off, I get sound, but only what the amp gives me.

I also should have mentioned that everything was working perfectly yesterday. I'm at a loss.

 

Disregard. Bad power strip. I knew it would be something stupid ... and stupidly overlooked by me.

Time for a beer.