Beolab 2 Powers on but no signal

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  • #8288
    mojofml
    BRONZE Member
    • Topics Started 6
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    I picked up a very beat up Beolab 2, it powers on when plugged in (red LED), but when I plug in the powerlink cable and try to play music, there’s no sound (still red LED, does not turn green).

    I took it apart and looked at the fuse, it visually appears not blown. That’s pretty much all that I know how to do. Any common causes for said symptoms? Would the only thing that I can do be replace the board/sending it somewhere for repair? thanks!

    IMG_20220901_210055IMG_20220901_211142

    #8290
    KolfMAKER
    BRONZE Member
    • The Netherlands
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    Hi mojofml,

    Do you have a multimeter and know how to handle that?

     

    #8291
    Die_Bogener
    BRONZE Member
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    It is not a good idea to plug in power, having a red led and then connecting Powerlink. Can make a big PLOPP and then nothing in the future…

    Has it ever worked before, did you see or hear it or bought defect?

    #8298
    mojofml
    BRONZE Member
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    I have a multimeter but I don’t know how to handle it haha

     

     

    #8299
    mojofml
    BRONZE Member
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    It is not a good idea to plug in power, having a red led and then connecting Powerlink. Can make a big PLOPP and then nothing in the future… Has it ever worked before, did you see or hear it or bought defect?

    I’m sure it worked before, before I bought it

    #8302
    KolfMAKER
    BRONZE Member
    • The Netherlands
    • Topics Started 14
    • Total Posts 105

    If you don’t have/know how to handle a multimeter, try to find someone who does, and has understanding of power supplies and amplifiers.

    #8309
    9_LEE
    Moderator
    • Eastbourne England
    • Topics Started 8
    • Total Posts 21

    Have you double checked your powerlink cable, or checked that whatever you have it plugged into is set up for it – or has working powerlink sockets?

    I only ask as in 20+ years of dealing in B&O I have to say that the BeoLab 2 ranks as one of the most reliable and trouble free pieces of B&O I have ever dealt in…

    Lee

    #8324
    mojofml
    BRONZE Member
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    If you don’t have/know how to handle a multimeter, try to find someone who does, and has understanding of power supplies and amplifiers.

    seems i have no other choices, will do thanks!

    #8325
    mojofml
    BRONZE Member
    • Topics Started 6
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    Have you double checked your powerlink cable, or checked that whatever you have it plugged into is set up for it – or has working powerlink sockets? I only ask as in 20+ years of dealing in B&O I have to say that the BeoLab 2 ranks as one of the most reliable and trouble free pieces of B&O I have ever dealt in… Lee

    Hi there, i’m absolutely sure there’s no issue from the signal/cable end, because I have another perfectly good working condition Beolab 2! I bought this as a gamble in hopes it would work (seller didn’t have cable to test the signal), but i guess not only is it very beat up on the outside it is also the case on the inside 🙁

    #8328
    mojofml
    BRONZE Member
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    Found the service manual, maybe it’s the base unit that’s faulty (the front facing piece)

    Capture

     

    Is there any way to test the base unit? I will not use my working condition Beolab 2 to test it 😀

    • This reply was modified 3 months ago by mojofml.
    #8372
    mojofml
    BRONZE Member
    • Topics Started 6
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    Just to update in case anyone interested – I used a 9v battery and connected the base unit +/- terminals and hear a mild clicking sound. I’ve also managed to source a multimeter, i’m getting an ~8ohms reading so I believe it’s working properly. Will try to test the board over the weekend as well.

    I tried one other thing – i tried to put one of my beolab 6000 speakers through the “out” from the beolab 2, still no signal goes out to the speaker.

    • This reply was modified 3 months ago by mojofml.
    #9392
    mojofml
    BRONZE Member
    • Topics Started 6
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    I’ve finally caved and took my working Beolab 2 apart, and tried putting in the base unit from the non-working Beolab 2 into the working one, and it still did not work. The light does turn green and I do hear a very weak hum if I turn it up a lot though.

    I’ve done the 9v battery test, and as you can see in the video the difference is very significant. What I haven’t though is to put my working Beolab 2 base unit into the non-working one to test the rest of the parts (ie. the board, amp, etc) from the non-working unit. I would like to ask, is there is any risk in putting my working base unit into the non-working Beolab 2? I don’t want to end up with 2 non-working Beolab 2.

    Also, any chance I restoring the non-working base unit? thanks a lot.

    #9399
    Die_Bogener
    BRONZE Member
    • Topics Started 1
    • Total Posts 99

    Hmmm, the left one is ok.

    The right one is somehow “blocked”, there is a hard stop in the membran. Maybe it was overload or somebody crashed into the loudspeaker.

    Does it move by hand?

     

    #9408
    mojofml
    BRONZE Member
    • Topics Started 6
    • Total Posts 22

    Hmmm, the left one is ok. The right one is somehow “blocked”, there is a hard stop in the membran. Maybe it was overload or somebody crashed into the loudspeaker. Does it move by hand?

    Yes quite noticeably something is impeding it when i press down on it, i’m trying to figure out how to take it apart. I can’t find a guide anywhere to do it, but i’m guessing I will need to unseat the spider to gain access to a few screws below it order to take it apart.

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