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Hi Christian,
The fact that the red LED still comes on is actually encouraging. If the main fuse had completely blown, I would normally expect the speaker to be completely dead.
Since the speaker was accidentally connected to 220V while still configured for 110V, I suspect the standby power supply may still be working, but another part of the power supply could have been damaged.
My suggestion would be to start with the basics:
- Check the mains fuse with a multimeter (power disconnected).
- Post clear photos of both sides of the power supply board.
- If you are comfortable using a multimeter, measure the secondary supply voltages coming from the power supply.
Also, did you hear a pop, smell anything burning, or see any smoke when it happened? And does the other speaker still work normally?
Those details may help narrow down the fault considerably.
Good luck, and don’t give up on them yet — the fact that the LED still lights up is a positive sign.
Location: The Netherlands
Favourite Product: BeoSound 9000
My B&O Icons:
Thanks Christian, for posting the photos.
I don’t immediately see any obviously burnt components, damaged tracks or leaking capacitors, which is hopeful. Before measuring anything complicated, can you tell us exactly what the speaker does? (When connected via PowerLink/Line-IN and starting music):
- Does the LED stay red permanently?
- Does it change from red to green when a signal is present?
- Do you hear any clicks from inside the speaker, when music is started?
- Does the other speaker still work normally?
Let us know your findings.
Location: The Netherlands
Favourite Product: BeoSound 9000
My B&O Icons:
Hi Christian,
One important question that may help us narrow this down: How exactly are you testing the speaker?
Are you using:
- PowerLink from a B&O source?
- The RCA input?
- Something else?
You mentioned that the LED turns green when you power the speaker on. Does it also stay green while music is actually playing?
Knowing how the speaker is being driven is important, because it helps us determine whether the amplifier is receiving an audio signal at all, or whether we should focus on the audio input stage first.
The fact that the LED goes green and the relay clicks is still encouraging, as it suggests that a large part of the electronics is functioning normally.
Location: The Netherlands
Favourite Product: BeoSound 9000
My B&O Icons:
Thank you, the photos help understanding.
A few things are still unclear to me:
- During your test with the Pioneer headphone output, approximately where was the volume control set?
Very low, medium, or normal listening level? - For your tests, did you put the small switch on the bottom of the BeoLab 8000, to the lower position (LINE – see picture) when using the RCA input: yes/no? (The speaker may not work correctly from the RCA input when the switch is in the PowerLink position)
- Can you connect the working BeoLab 8000 using exactly the same setup:
- same Pioneer amplifier
- same cable
- switch in the lower (LINE) position
- same volume setting
- Can you share the results of this check?
- Also, when the faulty speaker LED is green, do you hear absolutely nothing at all?
No hiss from the tweeter, no hum, no clicks from the drivers?
This information will help narrow the fault down considerably.
Location: The Netherlands
Favourite Product: BeoSound 9000
My B&O Icons:
Great to hear you have practical helping hands to support you. Good for you!
For the interest of others reading this topic, please come back when your issue has been resolved. And ask your friend to write a short summary of the cause and how he solved it.
Location: The Netherlands
Favourite Product: BeoSound 9000
My B&O Icons:
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