Beomaster 2400 instantly turns off when a channel is pressed

[mark2000]

This is the craziest thing. My Beomaster 2400 is suddenly turning itself off every time I turn it on. Instantly. If I press phono or tape or a radio channel it turns on for a half a second and then turns back off. I can even hear a radio station for a moment before it goes off again. It’s as if the O button is stuck, but it’s a touch surface so I don’t know how that’s possible. I have tried cleaning it. I took the batteries out of the remote. It’s still doing it. I tried unplugging it and plugging it back in. Same. Something has to be sticking somewhere or short circuited. It just happened after awhile of disuse.

[Dillen]

There can be several reasons.
DC on an output – typically if solder joints are cracked the output stage transistors.
Bad switching IC – or oxide-shells between IC pins.
Problem with the standby touchpad sensor circuit.
Fault in a speaker or speaker cable. Try with no connected speakers/cables.

Martin

[Author]

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