I presume mine was a new one. I got it for a good price 4 years ago but I use it not often.

This message is out of the topic and maybe I should open a new one. You're story about ageing of your sensor and my recent reading are maybe connected.
Atik advise us to warm up the sensor before power off the camera. Indi detects there is no sensor, and conclued there is no cooler. No possibility for us to switch the cooler off properly.

In AtikCamera.dll Guide you can read :

Note: It is very important that this function is called at the end of operation. Letting the sensor warm up naturally can cause damage to the sensor.



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