alarming sound coming from pinebook pro

[jazzhands]

A couple days ago I received my Pinebook Pro. Immediately after first boot I started to hear an occasional startling sound coming from the lower half of the machine. It is the kind of sound that reminds me of a speaker getting its cable pulled out (although much "smaller" sounding of course). On the other hand, it plausibly sounds like a fan having a malfunction -- I have not heard a fan on this during use so far, presumably it has one?

If I had to guess, it is coming from the lower left side, e,g, under the caps lock and the meta key. It happens randomly, but at least 5 times in a couple hours of use.

Any ideas?

EDIT:
fwiw, https://forum.pine64.org/showthread.php?...#pid111949

[foobar]

I could hear a loud crackling buzz when starting the graphical session of Manjaro on my new Pinebook Pro. You may have luck with another distro. I don't hear that same buzz on a Fedora installation, but I haven't gotten sound working via the builtin speakers or headphones yet.

[foobar]

I could hear a loud crackling buzz when starting the graphical session of Manjaro on my new Pinebook Pro. You may have luck with another distro. I don't hear that same buzz on a Fedora installation, but I haven't gotten sound working via the builtin speakers or headphones yet.

Audio works on my system, with Armbian Jammy, for example. I noticed that the beginning of system sounds are cut off, so the device may be getting woken from sleep every time there's a new sound.