Hi qazxsw80 and Ralfm,   Thank you so much for your swift help! With the photos/description I was able to fix it in a minute. It was so simple! Now they are back and sounding amazing :D   Again, thank you very much!   All the best,   Linda

Hi! I have the same issue with my K-500. I tried to follow instructions to repair it but wasn't sure how to do it. Could you please explain in detail?   They say that I should take off the part where K-500 is written on but I was just not sure if it meant the gridded inlay with the logo or...