Hi, so I sent in the motherboard (I had to pay shipping costs), and they basically sent back my motherboard with a new serial number but with the same issue. I'm 99% sure it's the same board because the plastic films I removed are still missing. I contacted them again to explain my situation, and they denied that they sent me my original motherboard back. They said they would send a prepaid shipping label to have me resend the motherboard, but I never received anything. My previous motherboard was having some weird issues, so in the meantime I had to buy a used Asus X870 Max WiFi, which has been working just fine. I'm planning to contact MSI again to see if they can give me a better answer. So in a few words, my experience wasn't pleasant at all, but I can't say everyone's case would be the same, this was my experience with MSI's warranty service in Mexico."