Just thought I would pass this on since this just happened to me with my Elinchrom Monolight but certainly can happen to ANY flash system out there on the market.
What happened was during shipping the units to NY for a job the flash tube came slightly loose and when i went to fire them it started to Arc and burned out the internal prong and fired the tubes connection. This can happen to any flash system so be aware when shipping or transporting any flash unit the flash tube is secure to the connections before reusing them again. Certainly for me a expensive lesson learned.
I suggest putting a white cotton lint free glove in your lighting bag and use that to check the tube and modeling lamp. Never touch these with your bare hands as fingers prints will cause premature failure to them