Hissing/static noise coming from the Apalis module after heatsink installation

I installed the apalis imx8 module with heat sink on evaluation board, there is some strange noise coming from the module. I am in OS installation process and the sound is still going on.

There was a small glue type substance(I assume it is some kind of thermal dissipator) on the heat sink, I removed the plastic from that but do I have to remove that as well? the module doesnt seem to be too hot at the moment.

Hi @fahads,

We will check internally about the hissing noise you mentioned.

Yes you are right! This is a thermal dissipator aka. thermal pad and should not be removed. The temperature of the module is dependend of the workload.

Feel free to reach out if you have more questions, we’ll come back about the first question.

Best Regards