Briarne,<br /><br />Wow indoor fireworks. I HATE when things go bang. Last time that happened was one night at UBI. I was called in as a HPA dropped off and took off two transponders.<br /><br />The High Voltage was tripped on the power supply. I reset it and it came back on. Then a minute later it arced and BANG.<br /><br />Swapped the PS and got it going again.<br /><br />Its only 9000V DC <img border="0" title="" alt="[Smile]" src="images/icons/default/smile.gif" />