Probably a chip that costs a few quid, but they won’t tell me which one and all components are SMDs. How much for a new or refurbished PCB then? Well, that will be €93 and some cents plus €15 shipping plus VAT on top of the sum.
Hmm.. really? I told the service company that it was too much for this. They immediately explained prices went up cuz Brexit happened and offered me a 15% discount!? Hmm, again!
I considered my options and bought a new card: RME Babyface Pro FS. Not cheap, but I have two years warranty. My old card will become a doorstop or landfill material, unless someone wants to try to replace the broken chip or spend €100+ on a new PCB..
On the upside, I have gotten a significant upgrade in sound quality. RME rocks!