WRVB372

I just recently purchased a Radioddity DB25-G GMRS radio. When I first put this radio in my truck it powered up and worked fine. after a minute the radio flickered but stayed on. I checked to make sure all connections were secure found everything as it should be. As I went to hook up the external specker the radio shut down and would not restart. Fuse is not blowen and all connections are secure. The display shows very faintly. Dose anyone have any ideas what the problem could be?