LED lamp defective / headlights change themselves

Hello, my Ceed has already received the Kplt. headlight on the right (seen from the driver’s seat). Changed on guarantee. The LED is not defective again. I have read a lot that it can be on the board or on the tape itself. My dealer does not want to do this on a culant and not make an application. Cost njr for the headlight 1100,-…… Well the question whether you can do this yourself with craftsmanship. The main headlight, installation side right (must be right?) SNR 1260/ ACX costs 270 EUR in retail. The Tüv has criticized this. Last time I came with the defective LED by the TÜV. This tape unfortunately goes out again and again, always on the same page. I also read that it could be on the board. Do you have to re-learn headlights or reix the simple installation? Would you be very grateful for answers. Greetings