[gpv]

my beomaster 5000 stopped working, i heard popping and it smoked.
I inspected it and saw that the MM5450 IC (Display) was blown. Now I’ve changed it but the beo 5000 doesn’t turn on, the relays don’t even click.
What can I check to understand the problem?
Thank you

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[Dillen]

It could be an overvoltage problem on one of the supply rails.
Check for a shorted regulator. Begin with the one supplying the MM5450.
If so, repairs could be intensive.

Martin

[gpv]

Thanks I’ll start with these, I noticed that by inserting the headphones the mute relay activates and I hear a “hummm” noise.

[Author]

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