It seems that one of the board in my miner always start getting more HW errors than the rest. Anyone is experiencing that? For example now (chain 1: 18 HW, chain 3:28, chain 4 :220). Usually it runs fine for some time, but after it last board is getting much more errors. I just want to confirm weather I should try to get the board replaced or there is any other thing I could try?

Thank you for any advice
I think the 3rd board on the S9's are all producing more HW errors than the others. Most likely because of the heat and case design and air flow.
All of mine are like that and all the others I have seen are the same.