https://archivedforum.beoworld.org:443/forums/13.aspxThe main Meeting Place for BeoWorld members, and the place for General Questions, Answers and things to say! If you have any questions about anything Bang &amp; Olufsen related - please ask. If you have anything to say - please tell!enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/348601.aspxThu, 01 Dec 2011 13:27:10 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348601beowild0https://archivedforum.beoworld.org:443/forums/thread/348601.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348601<p>If&nbsp;the humm is constant&nbsp;please try the&nbsp;following:</p> <p>- Test the same configuration with all lights&nbsp;and other electric things switched&nbsp;off (Most humm&#39;s&nbsp;start from dimmed lights)</p> <p>-&nbsp;Change the power cord to another outlet (the same as your music system or the bl4000 without the humm)</p> <p>- Physically&nbsp;exchange the two bl4000&nbsp;but keep all the&nbsp;existing cables (just to be shure you really have a problem in one of your beolabs)</p> <p>Good luck</p> <p>David</p> <p>&nbsp;&nbsp;</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/348588.aspxThu, 01 Dec 2011 12:43:09 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348588sodoi180https://archivedforum.beoworld.org:443/forums/thread/348588.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348588<p>The humm is constant - more audible with no audio signal and power on.</p> <p>I guess while playing music the hummmm is supressed. Is it a simple fix to replace the power unit - the transformer i guess</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/348576.aspxThu, 01 Dec 2011 12:19:14 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348576Søren Hammer0https://archivedforum.beoworld.org:443/forums/thread/348576.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348576<p>Could definately sound like a problem in the power supply.</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/348562.aspxThu, 01 Dec 2011 11:00:57 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348562Evan0https://archivedforum.beoworld.org:443/forums/thread/348562.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348562<p>Maybe a transformer problem?</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/348561.aspxThu, 01 Dec 2011 10:55:12 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348561beowild0https://archivedforum.beoworld.org:443/forums/thread/348561.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348561<p>Hi </p> <p>Does the hummm stop after a while? </p> <p>Best Regards </p> <p>&nbsp;</p> <p>David</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/348229.aspxWed, 30 Nov 2011 14:20:05 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:348229sodoi180https://archivedforum.beoworld.org:443/forums/thread/348229.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=13&PostID=348229<p>One of my BL4000 is making a loud hummm when powered on. I coudl eliminate following by trial and error</p> <p>1. Powerlink Cable is fine</p> <p>2. Source is fine - AUX input from BS4000</p> <p>&nbsp;</p><div style="clear:both;"></div>