Just a quick question - maybe a 'duh' moment, but... I'm helping a local school troubleshoot their theater. They have a Strand CD80 dimmer rack, and a number of circuits which do not seem to work. Sending signal from a 1-1 patched console turns on about half of the circuits. However, plugging a plain old fashioned Home Depot circuit tester on a 2P&G adapter shows constant power on every circuit - just enough to light up the tester. Is that normal? I've used the tester in other theaters and have never noticed it lighting up even when the circuit isn't switched on by the board. There is not enough power to turn on a light without the console. The company that did the install was somewhat less than reputable, so I'm not sure where to begin the investigations.