Hi, I've just replaced my radio after the screen went blank. Bought a replacement Becker radio off Ebay, complete with code, operating manual, and FM antenna. Fitted the replacement unit (didn't replace the FM aerial module), entered code OK. New unit powers up, all information shows on screen, but zero sound coming out on radio or CD/DVD. Although the previous unit had a blank screen, CD's still played so I guess this rules a problem with the amp out. Any advice, please?