nano swinsid background noise

Hi guys, i have assembled a nano swinsid, it works but after 7/10 minutes from poweron i hear a background noise. Have you idea on how to fix the issue? Note: JP1 is closed while JP2 open

thanks a lot

Hi, is it possible that the problem is caused by the oscillator?

thank you

Hi guys,

I solved the problem, the culprit was my power supply. After a while from the power on, I presume a component did not works fine giving a bad output.

I have replaced the power supply and everything works fine.

zp