Hello, new to the forum and new to vintage bang and olufsen audio equipment. After succesfully rescueing a Beogram RX and a beocenter 2002 I now ran into problems with a newly aquired Beocenter 7002. Radio and turntable worked fine but problems with the cassette deck, basically melted belts. I changed the belts and after putting things back together teh system worked for five minutes. After that  it shows a yellow/orange exclamation mark on start up with the letters' watt' beneath. The display does not come on and the touch panel is unresponsive. What can this be? I cannot find any information on this error code on start up