jaca

Hi,
Just wondering if my LP-16 is faulty as its makes pop noises when I change modes (ST/MT) and also when I leave from menu back to playback.
Its not very loud but clearly audible, like a static pops. I have updated firmware to latest but if I remember correctly it was also present in previous firmware version.
Does anyone experiences similar noises? Is this normal or my LP-16 its faulty?

Thank you