This is a permanently installed LED board and can only be replaced by a professional.
You can contact one of these companies for repairs and spare parts.
Luminaire workshop
Franco Cantaffa
Steinmürlistasse 36
8953 Dietikon
Tel.: 079 780 66 69
https://www.leuchtenwerkstatt.ch/
Globag
Mr. Vetter
Franz Rittmeyer-weg 5
6300 Zug
041 712 22 85
https://www.globag.ch/
We can order the lamp head including bulb and also the base separately from our supplier. If you are interested, please contact our customer service in writing.