Need help. Cr1 radio unit problems
 

Need help. Cr1 radio unit problems
Blaupunk cr1 head unit gets power and lights up but no numbers displayed and no sound. Could it be because of a battery replaced? If so I have the code but no instrutions on how to input it. Thanks in advance, Really would like some help please!

If it is an "anti-theft" model, then you will have to input the code to make it work any time the constant +12V supply is removed from it, such as when replacing the battery in your car.
Blaupunkt has manuals for all their models online, but I didn't see any CR1 listed. Maybe you left off a digit or two. You can check them here: http://www.blaupunktusa.com/pdfs/pdf_library.html

thanks todd but i'm not even getting the word code. It has the lights when I turn it on but otherwise nothing. The tape wont go in and no numbers are displayed. Obviously no sound either. Could this be a fuse? I know I have a fuse box under the hood. Is there another fuse box inside the car?