Hi, just got myself a Nissin Di622 earlier this month and after using it for less than 10 times the flash refuses to charge up! It will start and the red light will be there but there's no 'wheeze' sound and the light doesn't turn green.
Changing to new batteries doesn't help as well, and had to bring it down to the service centre where i have to wait for 2 weeks(!!!) before they can diagnose what's wrong with the flash. I'm just wondering if any others have the same problems for the Mark1 or Mark2 or if I'm just one of the 'lucky' ones?