Helllo everybody....

i have this soundbar to repair for a friend. Its finally 2 years and seldom used but already broken.
Inbetween it has one time started, but no more yet.

Is anybody who has schetatic or service maual ?!

Power supply seems to be ok and has stable 24V DC. No control line or somthing else...........
No thermal hotspots or something else controlled with thermal imaging cam.
No reaction on remote control (function ok, can see it while glow into mobile-camera)
No shorts to detect.
ALso tested all reset procederes...