I put some cheap 1.5v alkaline batteries to test the flash, oops, nothing happened. I suspect something catastrophic. I removed the batteries and tried with eneloops and still the same.

I was very disappointed at this moment and tried to contact the seller.

Nevertheless, I want to try for one more time and I put back 1.5v and turned it ON...la la...everything worked. I suspect some contact problems with battery basket....

Does anybody have such a behaviour with this flash?