so its the KT7 / 2000+ that wont post, or the A7V / 1.4?
if its the KT7 / 2000+, which I'm assuming it is since your a7v133 really isnt suitable for a 2000+, and the KT7 works fine with the 1.4, then RMA the 2000+. People could probably be of more help if you carefully restated your problem in...