BeoLab 8000: suddenly switches to Off while playing music

[KolfMAKER]

I have one BeoLab 8000 (serial nr. 1086 xxxx) with strange behavior.

My music source is connected via the RCA/Line input in the foot. The selector switch is set to  RCA/Line.

 

This is what happens:

• When I start playing music, it does not immediately switch to On. Only when I set the volume on my source quite loud (appr. 85%), the BeoLab switches from Standby to On.
• After having played music, but at a lower volume level then that made the BeoLab switch On, the BeoLab 8000 switches back to Standby/Off after appr. 35 seconds.
• When playing music on the same volume level as the level that made the BeoLab switch On, it keeps playing.

 

Question

• Anyone, any idea what could be wrong?

[KolfMAKER]

Thnx for responding and sharing your suggestion Auric.

Yes, I know about the foamrot issue. In this I did check all PCB’s, connectors, etc. for foamrot. Some copper traces have had a ‘by-pass’ already.

What bothers me is that at high volume/signal strength the Stand-by/On switching works well. But at low volume/signal strength it doesn’t.

Do you have any other suggestions?

[KolfMAKER]

Thanks @Auric & @Die_Bogener

I think what I will do next is switch the PCB with the LED. I have one of a working BeoLab 8000 that I can try if that makes a difference.

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