Hi Keith,
Sorry to hear about this; there have been what I believe are tube-related failures reported recently. Whether this is a disturbing trend or not is really only visible to people that shop, but.I have indeed flagged it. But I am glad to hear of the excellent support from Zzounds.
The fix to this issue (as far as I am aware) is to check and replace fuses and then fit new tubes - if this does happen again, you could ensure you have at least those spare parts. Fryette provides a 90-day warranty on tubes, so if they fail within this period, we will ship them out to you free of charge.
I would plug it in and put hours on the tubes and use it. If it is going to fail early, it will, so better know now rather than later. In parallel, get those spare parts.
Regards,
Dan