mobile

Purchase a moto g 4g and unfortunately he had an accident with water, let it dry naturally for a long time, when I called messages appears that applications stopped making it impossible to use, just tried to reinstall the factory rom via fastboot but without sucesso.Logo noticed it seems that the water damaged the internal memory because I can not make any flash nele.Vamos there my question
Since he has input to memory card, there is the possibility of installing his system on the memory card?
By need for your help, I have the device only a week ago
thank you