ok so i recently bought a 90 crx si with a b16a swap..when i bought the car it had a huge gay monster tach bolted to the dash and a air fuel ratio gauge also and the head unit that was in it wouldnt except cds so i put my other head unit and everything worked fine for about a week

then i took out the tach and a/f gauge and clipped the head unit back in and now it wont turn on the only thing that works is when i hit eject it lights up and the face flips down.. so i put the one that came with the car back in and that one does nothing at all... WTF!!

i am the worst when it comes to electical so does anybody have any ideas i would appreciate it so much thanks in advance..

 

Check radio acc. fuse in under dash fuse box, and check radio back up fuse, [12V+ constant] normally found in engine bay fuse box and normally a 7.5A fuse labeled backup. 94