Query failed: connection to localhost:9312 failed (errno=111, msg=Connection refused). Quick question (G5 noise with UPS) - Genius Bar Discussions on AppleInsider Forums Toggle navigation All Forums Recent Posts Sign In Quick question (G5 noise with UPS) westonm Posted: April 22, 2004 8:09PM in Genius Bar edited January 2014 Should G5s hum loudly when powered off of a UPS? (only when it goes to battery backup, not just powered "through" it) Comments Reply 1 of 9 dmband0026 Posts: 2,345member April 22, 2004 8:32PM What is humming? Are you sure it's the G5 or is it the UPS? If it is the G5, make sure the voltage is set correctly on the UPS, it could be too much for the power supply.That said, I know nothing about UPSs...good luck. Reply 2 of 9 cosmo Posts: 662member April 22, 2004 9:55PM My UPS hums quite loudly when its running off of the battery... Reply 3 of 9 ebby Posts: 3,110member April 22, 2004 10:05PM My UPS is louder than my G5, but I tried and didn't notice anything strange. Reply 4 of 9 westonm Posts: 140member April 23, 2004 2:43AM I'm pretty sure it is the G5 that is humming, it makes kind of a "static-y" noise. Quite loudly....APC Back-UPS RS 800 Given to me by a friend who said it would work fine. I'm beginning to wonder.... Reply 5 of 9 westonm Posts: 140member April 24, 2004 2:57AM Anyone... <bump> Reply 6 of 9 ghost_user_name Posts: 22,667member April 24, 2004 3:01AM An appropriate title (#9) would have likely gotten you a better response. I'm editing it so onlookers will know the problem at a glance. Reply 7 of 9 ebby Posts: 3,110member April 24, 2004 3:04AM I'm guessing it is your power manager that is humming. (High pitched, right?) My G5 does this when I transfer large files using multiple interfaces at the same time. (Hard drive, firewire, USB, ethernet) The noise is normal but has had many people worried. Me too for a while. I think there is a solution that temporarly fixes it in somethign called CHUD tools, but I am one of the least qualified people here to tinker with such things. Any advice I give you with CHUD will surely cause a melt-down. Reply 8 of 9 westonm Posts: 140member April 24, 2004 5:21PM Its not that high pitched. It definitely sounds like "electricity" is all I can really say, and it is quite loud. Again, I'm I just paranoid here? Reply 9 of 9 ebby Posts: 3,110member April 24, 2004 5:54PM Naa. I wouldn't sweat it. Most G5's sound like they have little sparks in them when cretin things happen and from what I can tell it is perfectly normal. Sign In or Register to comment.