The optical module is incompatible or damaged. According to the official website of Viltrox Co., Ltd., we learned that if the Viltrox adapter ring does not respond when it is turned off and on again, the optical module is incompatible or damaged, resulting in a crash state. The optical module needs to be replaced before it can be restarted. Vitros is a brand of Shenzhen Jueying Technology Co., Ltd. and is a brand of professional photographic equipment.