I got my PS5 two weeks ago and I was not impressed by the fan noise. I expected it to be a bit more quiet. Don't get me wrong, it is super quiet compared to PS4! So I opened it up to check which fan lottery I won. I got the fan from the unboxing video, which is not as quiet as the other ones I guess. I also noticed some coil whine from the power supply while playing Demon Souls etc. but nothing major, so I didn't bother much. So yesterday the fan started rattling out of nowhere. I opened it back up to check if theres something wrong with the fan or the sticker that some PS5 owners found inside, but I couldn't find anything. The fan still rattles.. So I tried to do the Hermen Hulst and put my PS5 upside down and it worked! The fan is now back to "silent" and stopped rattling. I will probably return my PS5 to Amazon or Sony in a of couple months when there's more supply, so I don't have to wait too long for a repaired PS5.