Buzzing Sound While Mac Pro is off
I just noticed a very low bizzing sound coming from my mac pro. It occurs when the machine is actually off. Is this something to be concerned about? Do others have this very low sound coming from the computer while its off?
PSU first likely suspect I guess.
Also insure that if you have a UPS, that it is above 1000VA, also related to problems.
Mine causes a hum when in use, trouble is, that even after shutdown, my ears still ring (sounds like 100s of chirping crickets or just plain "tingling ears" that won't go away for hours once it starts.
Hard drives have often been able to set the whole metal case to some kind of hum or discordent clash of vibrations.
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Details:
I'm finishing a music project that was created on a PPC G5 Quad computer and going to a studio in Santa Monica to complete the final mixdown. My 3rd party software plug-in configuration is unique, and the studio doesn't have all of the software instruments that I do on their 8 core mac pro. My G5 software installation is mirrored to my MacBook Pro, but the MBP doesn't have enough CPU power to play the project back.
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Yep, power draw. How about this for a knee slapper:
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Now I have a poor electrical system in the current house that
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If your Mac is asking for more than it's getting there might
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Make sure it's that only thing plugged into the socket that
you're using for it and see if that doesn't solve it. -
i do most of my work on a mac pro (1,1)
and this evening at precisely 8:04pm my mac pro clicked and then turned off
the computer did not shut down, it just turned off
i should note that the click i heard was the same as the one that i hear when i first press the power button to turn it on
attached is console starting from 15secs before 8:04pm
http://img705.imageshack.us/img705/6112/picture3o.png
my mac is on an APC ups and the power was stable at 8:04pm
programs running
mail
firefox
remote desktop
ichat (aim and bonjour)
internet sharing (to ethernet 2)
any thoughts on what could cause a power off?Same here. MacPro 3.1.
ALSO on an APC (Back UPS RS-1500). Woke up yesterday to the sound of it (UPS) beeping, red light on, computer off. Happened today, same way. Checked energy saver settings.
Wasn't using it, so did not hear click.
MacPro starts ok, shuts down ok, sleeps ok.
I had it plugged into a wall socket for two weeks while I configured it. No problems. Only after plugging into to the UPS. This UPS has served well backing up a Dual G5 tower previously.
Battery shows 100%. No heavy periphs (like printers) online.
Had a multimeter in the UPS the first time around and got 122 volts in the line.
Could it be the UPS? -
Hi All,
I have updated to OS X 10.7.5 on my Old Mac Pro (late 2008 or thereabouts) which was the latest OS X that was allowed. Since then it worked for a short while perfectly, then started to power on and off continually and I only occaisonally get it to stay on for 3 mins before it goes in to the power off/on cycle.
During these cycles it usally reaches the power up sound and then powers down ect
Please help!
Cheers
PaulDdi you happen to do a copy run start with module powered off? If so, I would think its expected behavior.
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http://en.wikipedia.org/wiki/KillAWatt $15
http://www.amazon.com/P3-International-P4400-Electricity-Monitor/dp/B00009MDBU
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http://en.wikipedia.org/wiki/Inrush_current
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http://en.wikipedia.org/wiki/Uninterruptiblepowersupply
http://en.wikipedia.org/wiki/SurgeProtectiveDevice
http://en.wikipedia.org/wiki/Line_conditioner
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Surge strips have their place, just not going to do a lot to clean or condition voltage or some problems, and sometimes just a way to overload an outlet. I've found the best surge protectors in hardware supply store.
A 1300VA $150 and 1500VA $175, plus best in line conditioner from ZeroSurge.
http://www.amazon.com/1300VA-Battery-Backup-with-LCD/dp/B000XFXEDW
http://www.amazon.com/APC-BR1500LCD-1500VA-Outlets-BACK-UPS/dp/B000NDA5E0/
http://www.zerosurge.com/HTML/standaloneres.html -
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There are many other apps as well. For both recording and editing you can't beat the shareware app Amadeus Pro.
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