I have the same problem with an Antminer T17+ 64 TH/s.

Minimum the halves of the heat sink have fallen off. The device was in operation for 1 month. Delivery December 2019.

In the first step, the repair center said that it was my fault. I should pay 1599 USD.

But:

- The device was always operated correctly and has no signs of wear on the outside (you can see it).
- We did not overclocked it (Kernel Log).
- The hash boards are not corroded or oxidized (you can see it).
- The device was not exposed to moisture and was sent to the repair center in its original packaging (you can see it).
- We don't immersed the boards in oil or liquid (you can see it).

According to their guarantee information there is no reason to deny the guarantee.

Bitmain needs to replace the device. Otherwise it's fraud.

I will report.