Half instrument cluster (half means all the gauges like temperature, speedometer, tachometer, fuel and odometer are not working

Hello, my half instrument cluster (half means all the gauges like temperature, speedometer, tachometer, fuel and odometer are not working. But sometimes it turned back on automatically. Last time when it turned on then I run the self diagnostic test and it is going fine. All gauges go up and down all the instrument lights are working no any kind off error. But today it went out again. So I decide to run OBD test and after the test, result is fine, no fault code. I also go to two car electricians and they said may be it is instrument cluster or may be is something else. I do not know what is the problem. Can you please help me?