Any ideas what might be wrong with one of my s9? I have 4 of them, one of them got fried the connections.

Recently started mining with Antminer S17 pro. Noticed a big different in temperatures between chips and pcbs on the same unit.

https://i.imgur.com/yE7tv6e.jpg

the differens is more than 20 degrees. Is it normal?

Usually was mining with S9's so the temerature differences was just a few degrees.