Technical Support wrote:
Does the success rate improve or decrease if the power is increased to full power?
If you remove the flash tube, do the external metal legs look clean or charred (internal glass will likely have black spots near the legs, and that is OK.
Are you getting a green ready light?
Thank you for your response...I think you may have inadvertently solved the problem by asking the question about the charred legs. As I mentioned, it is a new flash tube (and I am a newbie), so I removed it to check for charring and found none, but when I replaced it, it now seems to function perfectly. YAYYY!! Thanks again!!