how to fix my renault megane 2005 1.5 dci?

my radio is getting power to it as the eject button still works, my radio in all does not want to work??? also this has caused my dash clock and temp lights not to appear i have taken the radio out unplugged it all and re put it back together but still the same result can someone help please????? i have a renault megane 2005 dci. Thanks