Sorry for late response.

Here is the kernel log: https://pastebin.com/raw/Rk5ZxT3w
For replacing the hash board, once I buy a new one I will report back.
For the PSU, before buying a new one is there a way I can test it? I have a voltmeter if that helps. Also, I noticed that the PSU's fans are very dusty, so I will clean that up.
If chain#1 is getting power though, I don't know why chain#3 isn't though. No matter the case, thanks for your help.