Not working "at all"...

Question

Yesterday I was trying to fix this litle storage thing under my radio and while removing it I also disconected my radio unit .When finished I reconected but nothing seemed to be working .Its not a power loss cause when I press the "display" button it shows the time it seems to be "on" ...The other task it does is when opening to insert a cd it does, its just fine ... and eject it ..-but not play it .The tuner is also "dead" . Generally is not working .It has a reset button, which i presed but only resets the display time ...How am I going to find out whats happened ? The troubleshouting section of the instructions say that : when "the unit does not work at all" then "the built-in microcomputer may function incorrectly due to noise etc."And the cure is to reset ...But no ..!