Mac Pro Buzzing Power Supply (PSU)

Hi,
Have any of you experienced a buzzing sound coming from the PSU? Sleeping the machine gets rid of the buzzing. So I'm not exactly sure what is causing it.
Thanks

Just wondering if you are sure that it is the PSU. Could the buzz come from one of the drive sleds? I would rule that out and make sure that it is the PSU. Take the sleds out and see if it is still buzzing. If the sleds have drives installed, the screws holding the drive in place might need to be slightly tightened (a loose drive will allow the sled to vibrate.) If there isn't a drive in the sled, the sled might be vibrating. Anyway, just a thought.
It would be a good idea to put the machine on a UPS. This will regulate the power flow to your machine. I know that power fluctuations can cause the PSU to do strange things. (And with a MP, I feel that a UPS is a MUST.)
If the power to your computer is steady and the drive sleds are not vibrating, I think it would be pertinent to call AppleCare.
Anyway, hope this helps.
D.

Similar Messages

Severe Incompatibility between Mac Pro 2012 power supply and Tripp Lite 2400 watt Line Conditioner [switching transformer].

Severe Incompatibility between Mac Pro 2012 power supply and Tripp Lite LC2400 [switching transformer].
The Mac Pro will not power on when connected to the Tripp Lite LC2400. The Power Supply makes continuous clicking noises and repeatedly resets the Mac Pro every 3 seconds.
The same Mac Pro connected to an outlet with no Tripp Lite starts up with no problem.

Hi,
I've the same notebook. I've not had any hardlocks so far, but I've not seen so much flash movies yet. Anyway, I just tried closing running youtube-video tab on Kde4 + enabled desktop effects -> Everything's fine.
Anyway, perhaps we can collect some issues and solutions in this thread. Here are problems, that I encounter:
- restart does not work
- errors during boot:
[ 2.399277] pnp 00:0b: [irq 23]
[ 2.399308] pnp 00:0b: Plug and Play ACPI device, IDs SMO8800 (active)
[ 2.932179] pnp 00:0c: can't evaluate _CRS: 12311
[ 14.616662] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.07
[ 14.616771] iTCO_wdt: Found a Cougar Point TCO device (Version=2, TCOBASE=0x0460)
[ 14.616792] iTCO_wdt: cannot register miscdev on minor=130 (err=-16)
[ 14.616904] iTCO_wdt: probe of iTCO_wdt failed with error -16
[ 9.262898] sdhci-pci 0000:0b:00.1: SDHCI controller found [1217:8321] (rev 5)
[ 9.262920] sdhci-pci 0000:0b:00.1: PCI INT B -> GSI 18 (level, low) -> IRQ 18
[ 9.262966] sdhci-pci 0000:0b:00.1: Invalid iomem size. You may experience problems.
[ 9.263176] sdhci-pci 0000:0b:00.1: setting latency timer to 64
Issued solved:
- in order to make nvidia graphics working you have to disable Optimius in BIOS.
- Battery not recognized -- fixed after recend updates
- grub2 does not work. As soon as grub2 loads, the laptop reboots. -> stick to grub1 -- works now (either I did sth wrong the first time or a new version of grub2 fixes this issue)
- in order to make the touchpad work properly install psmouse-elantech from AUR
update: this is only a half-solution. vertical scrolling on the right edge works but graphical tools which rely on x11-input-synpatics still don't work. However, everything works fine with kernel 3.3. Once this in the main arch repos you won't need psmouse-elantech anymore.
Last edited by knue (2012-03-06 23:26:26)

Conecting 15 machinse (8 mac Pro + 7 Power Mac G4) to one mac mini.

I need to Conecting 15 machinse (8 mac Pro + 7 Power Mac G4) to one mac mini at the same time with out destrict me after 10 or 11 logins or i need the Software "Apple File Share Server or Apple Share IP instaler to run on Mac OS 9.2.2.

Thanks for the advice!
I'll look into getting a good quality UPS in the meantime, however the situation changed the other day when I came home from work.
I turned on the Mac and it got as far as the login screen. After about two minutes of being on the login screen (I didn't actually enter my details or touch anything at this stage) it just turned itself off randomly. Therefore, I don't think what I'm trying to do in Avidemux is totally to blame for the problem in this respect.
After the Mac turned itself off this time, it wouldn't let me turn it back on for about 30 seconds of pressing the power button. When it finally started up again, it seemed to run fine for the rest of the evening.
Does this sound like the power supply is on its way out or could it be something else? If I need a new power supply, will I need a specific type of power supply and not just a standard PC one?
Any further help appreciated.

My mac pro's power adapter has something wrong, sometime can work, sometime dosen't, can you fix it?

my mac pro's power adapter has something wrong, sometime can work, sometime dosen't, can you fix it? i brought this mac pro last year.

No, we can't fix it. Probably live half the world away from you and don't have telephatic powers....
But you can try yourself. First, make sure the connector is absolutely clean. The gold pins on the cable end should all move freely and fully extend out. The gold pads on the Mac connector should be spotlessly clean, and the area around them, where the metal ring on the cable goes in, should be free of any debris that may impede full seating and contact.
Next, the cable on the power brick should be in good condition, without kinking or fraying. If there is any damage, only solution is replacement, it is not serviceable.
Lastly, make sure the battery is ok. Go to the About This Mac item in the Apple menu, do More Info... / System Report... and select Power on the left column. In the Battery Information, Health section, make sure the Condition is Normal. Else, will need replacement.

Mac Pro 2,1 Spontaneous Restart with No Boot - Power Supply PSU Problem?

One day I was working away on my Mac Pro 2,1 Quad Core 3.0 (2007) with 8 gb ram running Lion and it just shut itself off like someone pulled the power cord (but no one did of course). Then it attempted to restart, but wouldn't boot. Basically I haven't been able to use it since as I can't get the computer to stay on for any length of time.
I'm thinking its either the power supply or the, oh no, logic board.
Symptoms have been like this so far:
Initially I would get a chime and a boot start but then I would find the computer would shut itself off somewhere in the process and try to restart. Usually the next time I would get no chime and a horrible repeated clicking of my optical drive with a rythmic fan whirring up and down on the original ATI x1900 xt graphics card. I would have to manually power off with the power button to make it stop. Sometimes it would try to restart again anyway. The only way I could get a chime again was to unplug and wait (longer the better). But even if i got a chime and a start of a boot, invariably the computer would turn off again.
I couldn't boot from another source, I couldn't run apple hardware test, I couldn't run diagnostic,... it just wouldn't stay on to do it.
I hauled my mac pro (out of warranty) to the apple store genius bar and the problem presented itself, continuously. The gent was able to get fsck to work long enough to determine my hard drive was ok and said it was one of three things - the power supply, the graphics card, or the logic board. He said because the comp powered on and then shut off, and because there was intermittent chiming, he didn't think it was the power supply. He thought it was the graphics card and said I could leave my Mac for 10 days and they could take a looksy, or I could just install a new graphics card on my own.
I chose the latter, bought a ATI Radeon 5770 from the apple online store for $275 and installed it.
Problem persists.Exactly the same as before. Got initial chime, then next time no chime, optical drives clicking and graphics card fan whirring up and down rhythmically.
I had a touch of time to disconnect everything and I get a chime consistently now when I have my boot drive, graphics card, 4 gb ram, and monitor attached. (As well as wireless mouse, keyboard, trackpad). I even got to logon once only to have a prompt shut off and restart attempt. also I verified it was at least one optical drive clicking (when I removed them both) during these boot attempts.
The improvement in chiming seemed to be when I unseated one ram riser ( I have to with 2 x 2g ram modules each).
I also checked the diagnostic leds on the logic board and all was as it should be... says I got trickle power and rail power etc.
Is there anything else I can do to determine what's wrong? What do you guys think is wrong? Could it be bad RAM? Power Supply? Logic Board?
All your help is massively appreciated in advance!

Well I ran as many tests as I could with no definitive results to the point I would have to start buying replacement parts and testing that way. I opted to take it back to the apple store and they said it's (dun dun dun dunnnnn) the logic board.

Mac Pro 2013 power rating

This thing isn't meant to be used at full power, right?
I mean clearly 450W isn't enough to power 250W+250W for the D700s, 130W for the processor, and maybe around ~30-50W for the rest of the system?
What's the catch here? Why underpower it? Why make a product that can't handle its own specs? Even if there was a bigger power source for all of this to work, that "cooling system" has nowhere near the capacity to manage all of that heat. I'm of course assuming full usage on both the graphics and cpu at the same time, which isn't at all an uncommon task.
What I want to know how much throttling happens, and at what configuration can i fully use all of the components at their full potential? Can the base system configuration do this?

there was a good discussion as often happens over on MacRumors MacPro forum that touched on this very aspect and it does point to it not being able to handle maxing out and stressing both graphic units plus processor.
I usually throw in 100W for RAM, storage (even though this one barely needs any for its PCIe-SSD), and whatever power goes into 6 Thunderbolt ports.
300W use to be what 4 x 75W for the four PCIe slots in OLD Mac Pro.
Electrical and operating requirements
Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Maximum continuous power: 450W
http://www.apple.com/support/macpro/
Step 22 ¶
With a rated output of 12.1 Volts and 37.2 Amps, we're looking at a 450 Watt power supply. The power supply has no dedicated cooling, and relies on the main system fan to keep cool—allowing the Mac Pro to idle at a whisper-quiet 12 dBA.
For comparison, we found a 450 Watt PSU in our recent Steam Machine teardown. The Steam Machine's SilverStone power supply featured a "silent running 80 mm fan with 18 dBA minimum."
And a quick look at what's left on the behemoth of a heat sink: Heavy gauge, flat power cables run from the PSU to the logic board and graphics cards, and remain intertwined in the heat sink.
http://www.ifixit.com/Teardown/Mac+Pro+Late+2013+Teardown/20778#s56812
Real world numbers:
" I quit FurMark and kept the FCP render going, which brought system power down from ~380W to ~326W."
http://forums.macrumors.com/showthread.php?t=1692536&page=7

MacBook Pro Retina power supply is surprisingly hot

The power brick seems to get a lot hotter than my previous MacBook Pro power supplies. Anyone else noticing this?

Just got my new 2013 retina MPB, and the powersupply is charging the battery in the MPB at an amazing rate (faster than 1% per minute) but holy Hephaestus batman that power brick gets lava-hot.
This is my 10th Mac laptop (personal) and none of the other power supplies have ever heated up like this. Other Mac laptop power supplies got very hot but never too hot to touch. This retina power supply, at the temp it was at earlier today, would cause burns if left on skin. So hot I am concerned about the plastic melting. Will check but I would not be surprised if when all the lights are off there isn't a slight glow to this lava powered adaptor.
My retina seems to love it and it does not get hot in the least. As i typed this message, the charge went from 40% to 67%. (freekin awesome) and the power supply is very warm but hot yet.
I cannot help but wonder if this is not related to the powersupply on house wiring with the reversed phase... My brick does not get hot all the time and not everywhere I plug it in.
<Edited by Host>

2008 Mac Pro random power cut+boot issues

Hello everyone,
I'd like to describe a problem I've been having and see if it tweaks any ideas as to what the issue might be.
In 2008, I purchased a Mac Pro 2x2.8. It's got 4gb ram (2x 1gb Hynix and 2x 1gb Kingston), 320gb, 1tb and 160gb sata's and a ATI 4870 graphics card. Up until about 3 months ago, everything has been dandy - it's the best computer I've ever had, however recently I've been having some intermittent problems that may be related, or separate.
Problem 1: In the morning when I turn it on, on some occasions it will power on for 5 or so seconds, then power right back off again. Sometimes this happens after 5, 10 or even 20 seconds (right in the middle of OS X or Windows boot). The only thing I note is that if it can get as far as the boot selector (hold alt at boot) screen, it won't cut out at that point, only sometimes after I wait a moment then select a boot option. This can sometimes happen 10 or 20 times in a row before it will eventually turn on and function normally.
Problem 2: Random power cut off, sometimes at idle, sometimes while browsing, or using any other app. I can't pin it on any one particular function. I know it's not a temperature problem, I have temp monitors on my menu bar and as far as I can see it's been fairly stable in that regard. Most of the time, I can power up the computer again but very occasionally it will revert to what I described in problem 1.
I have run the apple hardware test, with no errors being produced, and have had the local apple reseller/service centre take a look, with their tech reporting no issues. (He referred to something called ARD being run on a cycle of 20 or 30 times with nothing indicating a problem) I've taken off every non essential piece of hardware, tried with only the stock ram - and the newer ram to no avail of my issues. The only thing that I can still suspect myself is a power issue, however there is another PC in the room that has not had any issues what-so-ever.
Is there anything anyone could suggest I try to pinpoint this issue? It's sending me insane.
Thanks in advance for any help!

I found your post after dropping my G6 off at the Genius Bar - for precisely the same reasons. I've had this issue for the past 6 months on my (early) 2008 dual quad core. A month ago, the power supply entirely died and Apple replaced it. Now the same issue has returned and the computer restarts multiple times on boot up, at different points, sometimes as long as 15-20 minutes after booting up, when everything seems normal. At this point, two people at Apple have given me two different causes. 1) The person on the support phone said it has to be the power controller on the logic board. 2) The person who took in the Mac said it has to be the APS UPS (model ES 750) because the G6 has a 900 watt power supply and the UPS is only rated at 450 watts (750 volt amps). I had already thought of this as a possible cause and had purchased a power consumption indicator called Kill-A-Watt. Guess what? The G6 consumes at most 120 VA. In any case, the UPS fuse would have blown at overload. I don't feel like springing for a 1750 VA UPS unit just on the off chance that this might be the cause. This is also driving me up the wall. Additional info much appreciated if anybody cares to make educated guesses.

My Mac Pro wont power on please help

My mac pro wont start up.
I have already checked the power supply, fuses and have tried to zap the PRAM and changed the internal battery.
The on/off button is completely unresponsive and no light is showing on the monitor

To make progress, you need the fans to come on and the Chime. The conventional way to debug this issue is to remove EVERYTHING that could be drawing down too much power, and try for the chime.
Remove:
Graphics card
any other PCIe cards
Hard Drives
DVD Drives
external devices like USB devices
all but one pair of DIMMs
Then try to power it on. If it chimes, or the power light flashes, it's alive and can be debugged. Add back one item at a time and try for more.

Please Help! Mac Pro 2008 Power Problem!

Hi there! The reason of this message is to let you guys know about my problem
Last Thursday i was working all night with my 2008 Mac Pro. Early in the morning went to shut down my computer and discovered that i had a "no video signal" in my Dell monitor. Tried to solve that but i couldnt solve it. So I did a force shut down with the button
During the evening when ive returned home i tried to start up my computer but nothing happened when I press the Power button but a "click" sound.
This computer always performed really well. But right now my computer is not doing anything -no power- but that sound ive mentined.
I want to know if my computer is going to work with a new power supply or is something even worse -hope not-
Thanks a lot for all your help in advance!!

I have seen these symptoms before.
It could be a component like hard disk, video card or worse, power supply.
If you are getting a "click" sound what you want to do is see if the Mac can respond to a component missing.
Like hearing a heart beat through sound. Disconnecting components is a valid troubleshooting process.
Disconnect the following until you hear a chime:
1. All peripherals including display -- USB, FireWire, etc.
2. Video Card
3. Hard disk
4. RAM
If you hear a "heartbeat" add components back until it goes zombie again. Then at least you will know which thing needs replacing.
May also try zapping PRAM at boot: CMD-OPT-P-R
One time a MacPro was catatonic.
I booted to another drive with DiskWarrior. DW brought it back to life.
Good Luck

Mac Pro flashing power light (unresponsive)

Hello,
Twice this week a Mac Pro Quad 2.66 has become unresponsive after being left unattended. I have revived the computer by resetting the System Management Controller (http://support.apple.com/kb/HT1806).
It's obvious this is not normal. Should I bring the computer in for repair? Is there something else I should be doing?
Connected to the computer are:
- Two Lacie Electron 19 Blue III monitors
- Lacie usb drive
- Lacie firewire 400 drive
- JVC DV-HRS2 Mini DV deck (firewire)
- both ethernet ports are being used
Thanks,

Hello,
No USB hubs or USB/FW on the monitors. The lacie drives are older models and don't have the On/Off/Auto switch.
I think this happens when the computer and drive go to sleep. I will try to change the cables and plug the drives in one at a time.
Thanks Hatter.
The hatter wrote:
A device that doesn't support sleep and loses communication. And LaCie. USB devices and cables. Any USB hub.
Could be as simple as a USB cable; Firewire cable... does the Electron have USB and/or FW ports also?
LaCie recommends unplugging everything, shutting down, no power cord even and let sit a couple minutes.
Try without your peripherals and then try one at a time.
The big problem is if you are doing a hard restart w/o repairing your drives, whether you safely eject your drives first.
LaCie cables and power adapters can be a problem as I said, but any hub, mouse, keyboard can cause a problem but most often the mouse moves but you can't do anything and system is unresponsive.
No you don't need to take it in. I doubt Apple Hardware Test would find anything either.

Mac Pro international power cable

Hello everyone, I am currently abroad, but would like to purchase the Mac Pro via the UK online store to be able to profit from student discount (I study in the UK). I realize that if I order the Mac Pro in the UK store, it will come with a UK power lead. Given that I am currently abroad, is there a way to buy the power lead for my specific country (I don't know if it's a good idea to run the Mac Pro through a plug converter 24/7)?
Thanks a lot in advance.

You just need a pin converter and it's alright to use.

Mac Pro Low Power 1.5V FBDIMM's

Is there a way to get the Mac Pro to be able to use Low Power 1.5V FBDIMM's instead of the standard 1.8V FBDIMM's?

Wrong post

MacBook Pro (MC118) power supply problem

Hello.
I have MacBook Pro (MC118). I'm using two power supply (home, work).
Yesterday I noticed, that macbook does not charging up. So i decided that my power supply is broken. Found another at work (from my old macbook) and used it.
But when I got home and tried to use power supply (original supply that comes with my MBP) I was surprised. It doesn't work at all.
So today I tried another power supplies at work (from few other MPB) and they all doesn't charging my MPB!
And now I have only one power supply, that actually can charge my battery.
What is wrong with my MPB?
Thanks!

Yes, it's strange! Only one charger works for this laptop.
And unfortunately it's hard to use warranty in my country (Ukraine)

Why does my Mac Pro always power-up to the recovery partition?

I have a "classic" Mac Pro, I suppose, since it dates from about 2008 - Xeon dual core, though with 10G of RAM.
I installed Lion and everything works fine, except for one thing: whenever I power-up, I start up in the recovery partition. That doesn't actually bother me a lot, but it prevents my wife from using the computer if it's powered off.

Pram reset did the trick. Oddly, I've had my Pro for several years now and this is the first time I remember having to zap the PRAM.
My son (an Apple tech) was nearby today and told me that PRAM Reset (command-option-P-R all held down just before the chime and released after the chime) is the canonical solution for odd boot behavior.
Regarding other suggestions: yes, I did indeed open the Startup Disk selection in the System Preferences. It provided exactly one choice: my legitimate boot disk. Yes, I clicked on it anyway, even though it was the one that was selected already. No, it didn't make a difference.
Perhaps if I had had a choice of bootable disks I might have been able to switch between them and make the problem go away. But I only had one bootable disk to choose from.
I don't use Boot Camp, I run Windows through VMWare.

Mac Pro Buzzing Power Supply (PSU)

Similar Messages

Maybe you are looking for