I built a photo booth. Now having BIG problems. Using a canon 40D with sync cord to lap top. A JTL AC Slave with sync cord plugged into 40D. A computer monitor plugged into lap top. A stealth switch to start photo booth software that is plugged into a USB hub due to lack of USB ports on laptop. A dnp ds40 printer plugged into laptop. This past weekend I lost 2 cameras & 3 strobes trying 2 get it to work. 1st time I plugged in strobe to camera & sparks & smoke. Changed everything out w/ back up equipment. (Except used same computer & monitor ) and used my rebel t3 w/ hot shoe adapter for sync & boom everything smoked & blew again. ?????! Any ideas???