Do not work DVI and HDMI on the NVidia GTX 750TI

good afternoon. Nvidia GTX750ti has ceased to output a signal to the monitor (TV) with both hdmi connectors and one DVI. TV and cable is OK. Checked videorecord on another Board, the problem is the same. I. e is the problem it. Could you tell me what might be breaking and how to solve the problem? External damage on the map is not found... I will be Very grateful for the help!