Matriarch Help :( Strange "arteifact"

[Roo]

Hello moogers, my Matriarch, suddenly out of nowhere developed strange "artefact" which ist cycling (looping) every 5 Seconds, strange sound, beginning with very high pitch and ending with strange noise, like somethings contact with patching point... high-pitch--tssk--shhh and it keeps on repeating every 5 seconds, i tried to turn every possible know, updated it bit its still comes

[pmumble]

Does this happen even with all the oscillators turned down?

Have you tried performing a reset?