If your flash is defective, it is best to contact our service partner:
Rüdiger Maerz GmbH Süderstrasse 75a (entrance to house 77)
20097 Hamburg
Telephone number: 040 7314077
Opening hours: Monday Friday 8:00 a.m. to 6:00 p.mhr
Link to repair form:http://www.fotomaerz.de/reparaturservice/reperaturservice.php