Hi @Jocelyn_Intel ,
Thank you for your response.
I have checked my cooler for leaks or liquid loss and I could not find any. Regarding the pump failure, I am unsure of how to check this. Do you have any guidance on how to proceed? The only thing I can say is that the RPMs reported by my motherboard about the pump speed steadily remain at 3300 RPMs. I can also feel "tension"/"vibrations" in the tubes of liquid circulating in them similar to a working AIO I would say.
I have reloaded the BIOS defaults but I had to change a few parameters to be able to boot Intel XTU.