IMac :: Fixing 27" Humming Noise?
Sep 19, 2010
After returning 4 21.5" imacs with yellow screens and hard drive noise, I decided to try a 27" and finally a beautiful screen with no problems, no hard drive noise. I was very happy...untill I started hearing a humming noise that sounds like it is coming from the power supply. The noise stops when I put it in sleep mode. I tried a bunch of things to determine if it was the fans or hard drive and that was not it. I am pretty sure it is the PSU humming all the time. This is the first imac with a perfect screen and now it is humming. I am so frustrated.
What should I do? Have the power supply replaced or return it for another one and take the chance of getting one with a yellow screen? I am still within my 14 days of original purchase date.
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Aug 19, 2008
I'm new to this forum and I just bought a new iMac 20" 2.66GHz, I turned on my computer and noticed a weird sound (buzzing or humming noise) not loud but loud enough to here I notice when I messed with the Brightness it went away is there something wrong with that or is that a known issue?
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Jan 27, 2010
so i love my new 27"; it's simply fantastic.... so far. i encountered a problem when i plugged in a 1/8 to RCA to go to my surround sound system. There is a loud humming sound coming from the speakers when i connect it. i tried to wiggle it and push it further to no avail. the sound was still there. i tried using another cable and the sound was still there. then i tried plugging in my headphones, and they WORK FINE! what the hell is going on and how do i fix this problem?
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Jul 12, 2009
I dont know how long this has been going on for but ive just noticed it. ONLY when the display sleeps, the upper left hand side of my 24" imac makes light ticking noises once every few seconds (its very light ticks, theyre hard to hear unless you put your ear to the computer). It doesnt occur when the screen is on and when everything is on, and it doesnt occur when the computer sleeps, it only happens when I put the display to sleep, which seems weird. I don't think its the HDD, I've checked the SMART status and all is fine, I've also checked the console. Why is this ticking noise occurring when the display sleeps and no time else and what is making it?
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Sep 1, 2008
I've had my imac for under two years, and just recently I noticed it making an odd humming/buzzing sound at times. It's not the normal sound you hear when your hard drive is working hard, it's definitely different. It's not the speakers either, it happens whether they are on or muted.
My suspicion may be that it has something to do with the power. That's because I've been bug testing a mac beta game, and it often crashes my computer, and I have to manually turn off my computer by holding down the power button until it cuts the power.
Does anyone know why this may be and how I can prevent it/fix it?
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Mar 20, 2010
My Mac Pro 8 Core 2 x 2.8 GHz Quad-Core Intel Xeon with Leopard 10.5.8 started making a humming noise about a month ago. The humming noise is very consistent in pitch and is always humming whenever the computer is on, except for when sleeping.
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Apr 4, 2012
Yesterday I started up my MacBook Pro that I've only had for about 9 months. I immediately noticed that there was a barely audible buzzing / humming sound coming the inside of the laptop, most likely in the fans. I don't know how long this has been going on, and I really don't know the cause of it. So is this something I should be worried about (the sound is barely audible)? Or is this something that happens after prolonged use of the laptop?
Info:
MacBook Pro, Mac OS X (10.7)
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Apr 14, 2009
..by the power unit at the back of the machine - where the power cord goes in.
I happened to be switching out displays at the back of my MP today. Could hear the fan at the lower back portion of the machine (as normal). but this time could also hear a very slight electrical hum just by the power unit -- is this normal (the hum) does yours have this hum?
I never heard it before. guess my head was never that close to it when the MP was on the floor. but since i moved it to the top of the desk my head is closer to it when I switch out the DVI ports
Trying not to be obsessive. I'll run before the white coats turn up by the front door
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May 6, 2012
I purchased a 21" iMac a couple of months ago. Today it started making constant buzzing/humming noise. It's not really loud, but it is noticeable and annoying after a while. It stops if I put the computer in sleep mode or turn it off, but it starts back up the moment I turn it back on again. It sounds like it is coming from the bottom of the screen near the speakers. I have tried adjusting the brightness and volume, but to no avail. I also tried lifting the computer off the desk to see if it was just vibration, but that did not make a difference either.
Info:
iMac, Mac OS X (10.7.3)
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May 11, 2012
I have a 2006 White Intel Imac and I recently replaced the Superdrive with a non apple Panasonic Superdrive Model: UJ-85J-B from a used Acer Laptop. The replacement drive has no sensor circuit board. After putting it back together there was a loud humming noise and I assumed it was the new drive but when I took it out and started the Imac without it the noise remained? Now I am thinking it is the fan just below where the Superdrive sits? I blew out as much dust as I could from this fan and around the bottom of the case and that made the noise just a little less annoying. It sounds like it is about to take off like an jet airplane?
Info:
iMac, Mac OS X (10.6.8)
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Jun 24, 2014
There is a loud and really annoying humming & static noise when I connect my charger to my MBP. The humming only comes out of the headphones jack, and not the MBP speakers. This really cripples me in my work as I am a music producer.
Mp3 of the noise: [URL] ....
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Jun 7, 2012
My 20.5 inch 2.7GHz iMac is about a year old and has recently started making a low humming/buzzing noise from the top right corner, near the SuperDrive bay. The top of hte iMac feels quite warm when it makes the noise and usually stops if I hold my hand on top of the computer. Is this something I should be contacting AppleCare about?
Info:
iMac, Mac OS X (10.6.8), 2.7GHz, Core i5, 4GB RAM
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Jan 10, 2011
As per title... Loud grinding sound, goes away on restart, seems to be happening more consistently in the past few days (noticed it last week for first time). The MBP is 3 years old I have an appointment at apple store for tomorrow, im pretty sure they'll just say that the right fan needs to be replaced (applecare warranty ended a month ago of course)
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Jul 3, 2006
have a BlackBook... just noticed today that when i touch the track pad in the middle and then lift my fingers off, it makes an annoying click noise. (it almost sound like a bug zapper) This does not happen if i touch the track pad on either side... just in the center...
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Nov 5, 2010
My MacBook Pro 15inch makes a hollow sounding click/ping noise when I move along the track pad. It's NOT the motion sensor, that noise is more defined and pinpointed. This noise is random, sometimes occurs non-stop for an hour or two at a time every time I move the mouse, but usually occurs at random. Sometimes it also occurs when i have my computer on my lap or tilted and move it from side to side. But again, it is not the normal motion sensor noise.
I'm on my third MacBook Pro in less than 30 days. My first one corrupted all my files and my second one pinged like this one. I just need confirmation that this is actually OK and I will get a good MacBook and the money will be well spent. I think most of my issues stem from the fact that I'm new to Mac and just don't know what is normal.
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Aug 28, 2007
My Macbook had a wierd nosie coming from the fan. Its sounded like a ticking noise and got more frequent as the fan speed increased.
Its only a week old, but never notice it before, properly because I use it infront of the TV.
However, I have use a can of compressed air and blasted the rear ven, which seems to solved the problem. I have loaded the machine upto 4500 rpm and still no ticking noise.
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May 30, 2008
not sure if anyone else is experiencing the same problems but every 20-30 seconds or so I can hear the hard drive clicking and going away, is this normal ? Its not the mentioned "loud screeches" or other kind of annoying sound, its just like a little click, this is after the 10.5.3 update, just wanting to know if some of you experience the same thing ?
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Nov 7, 2007
I've recently been getting a clicking noise from my hard drive, and when it happens 90% of the time my mac crashes for about 10 seconds. First thing I did was verify my disk in disk utility and I got a response I'm not entirely clear of the meaning so I've attached a screenshot of what my response is. I'm going to try some other 3rd party app to see whats up with my hard drive such as techtool pro...I'm on a 2.33 ghz 15" macbook pro with leopard.
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Sep 10, 2010
Last week I recieved my 27" iMac i7 2,93GHz with the 2TB Hitachi Drive.
I ordered this drive because it was said in this forum that this one should be silent.
Now, during access it is not really silent, but thats no problem
What bothers me more is, that there is a permament silent hum. An I can fell this vibration even on the stand (hopefully this is the correct term, I am from Austria, so english is not my native language).
And this vibration is also forwarded onto the table, but it is not really feelable on the table.
So my question is: Some say that their iMac is "dead silent". Mine isn�t, I also can here the fans silently, but that doesn�t bother me either. But this humming is somewhat distracting or annoying.
Maybe I am just to "picky", but do you really have iMacs which are almost inaudible?
Because I do not have any other problems I am not sure whether I should ask for a replacement.
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Aug 16, 2010
My new iMac 27" (i3, 3.2GHz) is not so quiet as my previous iMacs -
I can hear a low humming noise! Not very loud, but I don't like it.
It grabs my attention...
It sounds like a fan motor or a transformer.
I can also feel a corresponding vibration.
Is this normal now? Does anyone else have this problem too?
Would you recommend to return/exchange this iMac?
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Nov 13, 2009
I bought iMac 27" from local apple store two days ago. Everything is fine execpt that there is some weird sound coming from the computer when the screen turns darker to save energy. Once I move my mouse to activate the screen, the sound goes away. I am saying the sound is so load, but it is still noticable and a little annoying in a quite room.
Update: I search "screem+humming+dim" and turn out actually a lot of iMac owners have this problem. Is it a technical issue Apple fails to resolve in general?
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Mar 31, 2009
There is a new humming sound coming from my parents iMac, I think it's the processor cooler but I'm not sure. It could be the hard drive as well, I just know it kicks up sometimes when there is a lot of activity. The problem is they don't do a lot on the computer so it scares them.
They are convinced that it is going to die because it's soo old, I think under two years, but this is the second computer they owned. The first was the first 20" G5 iMac that, instead of turning it off the correct way, they just unplugged from the wall outlet. Needless to say it died, but they think it was because their son in law used it too much. I try to tell them that it's because how they turned it off, but they didn't like their son in law, who is now an ex-son in law, so they blame it on him. Yes, I know, my parents are the last people to own a computer.
They also don't want to spend any money on their computer, so worse case scenioro, taking it to the Genius Bar without this computer being under warranty and having them replace the processor fan and/or the hard drive, what would it cost? I think it might just require a new fan for the processor cooler, but what if they need to replace a lot more?
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Jan 1, 2010
I have an external USB hard drive (WD Elements 1.5TB) and an external DVD drive (LiteOn iHAS422-08 in a Vantec NST-530SU enclosure) hooked up to the USB ports on the back. I can't seem to get more than 5Mb/sec out of them. That's USB 1.1 level performance from these USB 2.0 devices, even though I have no USB 1.1 devices hooked up to the machine (other than the keyboard). Bluetooth is off. I've tried completely powering down but that didn't change anything. What could be the cause of this problem?
iMac G5 Rev B
2GHz PPC
2 GB RAM
OSX 10.5.8
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Nov 23, 2009
I have accidentally slot in my SD card into the disc drive. Is there anyway I can take it out again? Will apple charge me for this? It is still in the warranty period. Anyway, I have to pay if they charge me. So careless!!
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Sep 9, 2009
So my brother was upgrading to Snow Leopard from Leopard tonight...and during the install, the time remaining went negative, then shortly thereafter everything froze up so he was forced to power down and since then nothing has been right. He can't restore from backup because apparently there isn't enough space on the disk, then we tried to repair persmissions, it says it cannot and to reformat hard drive...so we do that, reboot and then try to re-install leopard only for now, and when it comes up to choose a destination drive he is just a blank box, his hard drive doesn't show up!
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Sep 22, 2009
i am having a weird problem with my brand new imac.. I bought it custom made last friday with ATI Radeon HD 4850. Now here is my issue.. Every time i boot up it takes a while for the screen to turn on. I hear the start up sound and HDD working and all that but screen stays off for another 5+ sec. before finally going grey before apple logo comes up. Now I thought this isn't an issue since i did order it with ATI card instead of standard Nvidia. Figured different cards react differently. However, later on after playing a game for few hours and doing a restart it would do the same thing, but the screen would never turn on. Just stay black forever until i shut it down and wait a minute or two then power it back on. So to clear this up. What happens is, i push power button, start up sound happens, then black.... like it is off, not even the back light. This only happens every few days, not every restart.. I reset SMC, PRAM, ran hardware test, spoke with apple on phone, went to genius bar, and after all that and being passed around now the apple engineers are looking into my problem and i am expecting a call back from them. So i guess my question is, is there anyone else with this setup (ATI Radion) that has this issue?
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Sep 8, 2010
I have a new 27" I7 that appears to have the high pitch sound issue if the brightness is not at max or lowest. How "common" is this issue?
I do not need the perfect iMac (I have some gray banding and the 1TB HD grumbling and it is not a big issue to me) I just wanted to see if this high pitch noise is considered a defect and needs to be fixed/replaced or it is more common than not with the iMac.
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Nov 24, 2009
rite as some will already know i have took back my 27" iMac a total of 6 times and now i am on my 7th (4th one had screen issues), after actually accepting the "belly rumbling" "popping" noise and just getting on with the i5 experience, i thought i would actually contact Seagate direct on the actual matter for the rest of people on here who have doubt about there seagate hard drives.So i ring the operator i told him the whole story his first reply was sorry we dont support apple hardware! my response was "respected but the hard drive used is a seagate product"! he then replied saying sorry sir i misunderstood and quickly responded how can i help. I then repeated the problem and he asked for the HDD serial number, i was then very specific on the the noises we are all hearing and he made me repeat what i said a good 3 times so he had a very good understanding (in other words he did take this all seriously) he then said he was going to talk to the relevant person and put me on hold....10 minutes later he's back on the phone and he again asked me a final time! (ffs) to explain the noise he then quickly said in response the hard drive is supposed to make that noise. he named it the barracuda in seagates terms.
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Nov 8, 2010
sometimes but not always my mac pro starts to hum.
its on hardwood floors, and if i just gently move it a nudge, it stops humming.
is it the floor or an issue.
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Mar 15, 2008
I replaced my main drive, the 320GB with a 750GB Samsung F1. It seems to work fine. However it seems to have set up some sort of sympathetic vibration in the Mac Pro, which sounds like Hummm Hummm Hummm. Where as all the other things that cause noise in the case are a consistant and steady tone, this one is not. It's driving me nuts. Is this normal to be making this noise? I've tried it in different bays and it makes no difference.
UPDATE I've taken all the drives out except the F1, as I installed another DVD drive and three HD's and the noise has gone, so I'm now going to load each drive and review.
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