So my antminer s5's briefly reach 80-81 degrees C when I had left them for a while without enough airflow, but they were both set to shut off at 80.  Now on one of them, only one board will hash properly and the other has 4 o's and a lot of x's and dashes. It's drawing about 345 W from the wall and I know the power supply isn't an issue.

The other one has the same PSU connected but won't draw more than ~35W and won't mine.

Do you think this is because they reached high temperatures?  If so how would I go about getting them repaired? Other suggestions?

Thanks!!