Well it took longer than planned but I fixed my dead 4000 and it sounds as great as ever. As it turns out I was able to buy B&O parts from a repair shop and also located a replacement STK amp module on line for $13.00. Thanks again to all for your help - especially Peter who sent me the repair manual - invaluable! Ron

As some may have noted from my other thread, I'm in the process of trying to find parts for a B&O speaker. In case it's not been mentioned here in the past, this is a pretty useful site that compiles all craigslist and eBay search results in one place. If you type in Bang & Olufsen there are currently around 173 postings. Some are out

Thanks to all for your continued help. Graham, your points were valid and no offense (offence) taken - and your input on the prevaling attitude re: parts sales at B&O shops is appreciated. Also, thanks for the heads-up on the lack of location info. I should have done that right away as it always bugs me when such info is missing on several other

Thanks for the info. For the record I'm not inexperienced, just clumsy in this instance. (Electrical Engineer with many successful, complex, electronics repair projects in the past) - and who doesn't mind admitting mistakes even at the risk of getting condescending opinions from people who don't know me Will seek parts from my local service

Back again with good and bad news on the "dead" Beolab 4000 Thanks to Peter's help I was able to isolate the problem to low standby voltage when in line (RCA jack) mode. Should be 23vdc but I have 15v. But while trying to trace the fault back toward the power source I accidentally shorted out the 120VAC input to the standby voltage transformer

Thanks Peter! - very helpful info - the symptom mentioned in your snippet is what I have. By trial and error I'm focusing on the circuit that senses the presence/absence of audio and thus switches the unit from ON (green) to Standby (red). On my bad unit the presence of audio turns the LED green but does not energize the main relay. There is a 4

Hi everyone....... I searched on this topic and found one thread (bad amp) Is there anyone out there who can help me diagnose my dead 4000? I had not used the set for a while due to broken (chewed) cables under the house but now that those are fixed one speaker is kaput. LED's seem to work as designed (I'm using RCA phono jacks and cables connected