My father is unconscious for two days , he is able to move his hands but not able to speak or open eyes , all tests done nothing wrong ?

Something very wrong: Hi. I'm so sorry. Your dad sounds very sick. The fact that no tests have shown an abnormality only tells you that in the face of what sounds like a very serious condition, tests to show the cause or related abnormalities have not been run. We don't have a test for everything in medicine, but I would think a brain MRI, EEG, etc may show abnormalities. I wish him the best.

Take him to ER.: And have him evaluated asap.