Mac Performa 405 buzzing noise

Whenever I turn on my Mac Performa 405 after a while it starts to make a buzzing noise. I am almost positive that this noise is coming from the add-on Motorola 68882 FPU installed into the socket on my Asante MCiLC LC PDS network card. What can I do about this noise? It's driving me crazy & the Mac has also frozen once before briefly (it was running for hours on end though). Somehow a couple of minutes later Mac OS 7.5.5 managed to unfreeze itself. When I upgrade to Mac OS 7.6.1 will my FPU be better supported? The Mac has 12 MB of RAM though it only sees 10 MB too. Virtual Memory is also turned on since I'm trying to get Cyberdog 2.0 to run. Cyberdog 2.0 also freezes the Mac whenever I try to go to Apple's Support site too.

Craigwd_2000
It is characteristic of the Colour Classic, CC II, Performa 250, LC II, Performas 40x, and others that I wot not of from direct experience, that the lowest 2MB of 12MB installed are not addressed by the MMU. Pointless, but true. Add 2 x 2MB to the base 4MB and 8MB wil be used. Add 2 x 4MB and only the top 10MB will be used. If you feel limited by this, replace the LC II logic board with a Q 605 board and add a 32MB (or 128MB) 72-pin SIMM. My Elsie sings with the latter combination, and can run OS 8.1 with aplomb. With more RAM you wil be able to abandon Cyberdog (unless you wish to savour the agonies), and accommodate other applications with greater memory demands.
As far as the buzz goes, you can confirm the cause as electrical or mechanical (eg, the fan) by muting the speaker output, removing the FPU (if it is socketted) or the card if it is not, detaching the 4-pin power plug from the HDD or the cable from the FDD, and so on, one at a time.
You need only to elevate the rear of the case, as has been suggested, to increase ventilation enough. Given that, and the inner cleanliness that so-and-so's tonic water can produce ... you can find the source of the noise by attacking the suspects systematically. The speaker is awkwardly situated for direct listening, but you can do it with the case top off. Make sure of the security of the cables routed around the speaker, in case one or other is loose and being struck by the fan.
Apple IIe; 68K: 11DT + 4PB; PPC: 5DT + 3PB; G3: 6DT System 6.0.8 to OS 10.4.x

Similar Messages

Mac Performa 405 Won't Boot

I have a Mac Performa 405 that won't boot. It's running Mac OS 7.6.1 with maxed out RAM & VRAM. I have installed a networking card with optional Motorola 68882 FPU in the LC PDS slot. It has a Revision B LC II logic board. I have already tried replacing the power supply. I also updated Open Transport to v. 1.1.2. My next move is going to be trying to replace the fan. The Mac won't even bong. What should I do to get my Mac working again? Is the hard drive dead?

Update: I have swapped the RAM in my Performa 405 out for the RAM that originally came with it. This resulted in some very odd things happening. The RAM I was using before was parity memory. The RAM I found in the Mac when it was given to me was non parity. The RAM I had in the RAM slots before had three memory chips. The RAM I found in the Mac originally only had two RAM chips. Swapping the RAM also appears to have affected the logic board too. Now polarity on the fan plug as measured with my digital multimeter has changed. Before when the parity memory was installed the plug at the left was negative & the middle plug was positive. Changing back to the original non parity RAM changed the polarity of the logic board's fan connector so that now the middle plug is negative & the plug on the right is positive. I was also wondering what other tests I should perform too. The Mac also now bongs & is acting more normally than before.

Mac Pro 2010 and Lion: buzzing noise from CPU board when idle

Hi all,
I have a 2010 Mac Pro with the 3.2 GHz quad core. I recently installed Lion and now whenever the CPU load falls below a certain threshold (approx. 10-20%) something on the CPU board starts to make a buzzing noise. It sounds like a capacitor or coil. Sometimes it is nearly impossible to hear but most of the time it is quite annoying.
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Buzzing Noise from (IMAC 27-INCH,MID 2010)

I have noticed this buzzing noise (like crackling electricity of sorts) comign from the left side of the machine out of the cooling vent. I bought my IMAC in 2010 and have not had any problems with it until now. I noticed the "noise" a couple of months back and it would show up here and there every once in a while, it was not annoying, so I let it be. Until this last time, when the noise was loud and annoying, I could not just forget about it. I am under warranty and called into Apple to see what can be done for this problem. I was told to take it into my nearest Apple store to get it looked at, since over the phone they could not do anything about it.
I took it in May 11tt, 2012 and the guys at the Genius Bar were stumped? They had no clue and it was the first time the two gentelmen that helped me heard of this kind of problem! Since there is no moving parts on that side of the computer they escalated the problem "query" to apple engineering and was told it would take a week for a response. Thus far, I have not been updated on my problem or contacted as to the status of my problem. Its been 12 days and will be contacting them to see whats up!
Will update if problem is resolved!
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This might seem a strange answer, but it has fixed this fault on my 27" two year old iMac (at least for a few days now, will be monitoring).
I had this very fault suddenly develop last week.   It was consistent, the noise increased with screen brightness, but was also present with the screen asleep.
I looked at every forum on the subject, became almost convinced my fans weren't controlling properly as well.
I decided it was the switched mode power supply, discussed repair options with my local Apple Store.
Checked the household mains voltage - I'm in the UK, it was slightly low at 236v AC, but thats acceptable.
Then ....
We have a garden full of water features and LED lighting.
I just decided to check all our power junction boxes that supply power to various pumps and lighting.
I found one of the boxes full of water, with the Live, Neutral and Earth, and the 12v DC cables all under water and shorted together.   The terminals were all corroded and burnt.
Yet, I had no faults present in the garden, everything was running normally.   And the RCD breaker had not tripped.
I repaired the box, fitted new terminals and rewired the box.
And since I did that, my Mac has cured itself.
I've had it running for hours to get hot, no noise, gone completely.
And the mains voltage now measures 242v AC (should be a nominal 240).
The RCD did not trip because, with all the cables shorted in water, there would no out of balance condition to initiate a trip.
So, I can only assume that arcing or the short was causing some harmonics on our mains supply that was been picked up by the coils in the Mac power supply.
The 12v DC supply in the junction box was also supplied by a switched mode supply.   I dont understand why something didnt blow in the garden, but it didnt.
I'm monitoring the Mac as the solution just seems unrelated.
Oh, and I noticed our Intruder Alarm panel was humming loudly and now it isn't.
So, I would suggest anyone with this issue takes note of any unusual humming or buzzing in any other electrical item within the house, or outside.   It may indicate you have an issue elsewhere.
Even any loose mains plugs in equiment could be causing a slight arcing on the contacts, causing noise on the mains that may be getting picked up.
Coming from an interest in high-end analogue Hi-Fi, amplifiers always performed better with a dedicated, clean, mains supply, usually from a 40 amp rated cable fed direct from your electricity meter to supply your Hi-Fi.
The amplifiers would exhibit less noise and a cleaner sound with more detail.   And the transformers in the power supply were a lot quieter too.
And what do we have today - ethernet tranducers plugged into household sockets, superimposing high frequency signals onto the household wiring.
They would cause havoc with top-end amplifiers, I'm sure.
I hope this is the solution, saves me an expensive repair.
I've never had any problems with the six Macs I've owned in the last 12 years.

New imac and a buzzing noise - is it normal because it's irritating?

Hello peeps,
I got my new imac delivered today. Most things are fab, but I'm a bit disappointed with a buzzing noise that only happens when I reduce the brightness of the screen using the slider in the display icon under system preferences. If I keep it at optimum brightness the buzzing doesn't happen. Is there any way of darkening the screen another way?
I'm finding it big and too bright initially as I'm not used to a 24" screen. Is this something that happens or should I send it back?
Anyone care to try theirs and see for me? I would really appreciate this as it's really bothering me and I don't want to complain if I don't have to.
imac Mac OS X (10.4.7)
imac Mac OS X (10.4.7)

Welcome to Discussions
Try using: Shades from Charcoal Design be sure to download the "Intel" version. Shades gives you brightness control all the way down to a black screen, great for working in a dimmly lit room.
http://www.charcoaldesign.co.uk/shades
It's only my opinion, but I find that text images stay sharper at the lower levels using Shades!
Dennis
17" iMac Intel Core Duo 1.5GB Ram Mac OS X (10.4.9) Maxtor 300GB FireWire Creative Inspire 2.1 2G Nano

Horrible buzzing noise whilst on charge

Hi all...not sure if anyone has had the same problem but when my Mac is plugged into charge and I have audio or video playing I have this awful buzzing noise in the back ground but when unplugged the audio is perfect - maybe there is some kind of electrical interference happening but it is getting a bit serious as I am a musician and I need total clarity with my recordings. Has anyone had this before? Please help?
(Was thinking maybe a shielding issue or something)
Thanks in advance!

Are you using a third party power supply? I've heard some of these cause hum / buzzing. If you look at the comments here for example:
http://www.amazon.co.uk/65W-Apple-Replacement-including-PowerBook/dp/B0018QSQ06

Dv7 beats audio makes a buzzing noise or some kind of speaker feed back

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I just installed a Mac Pro for a client. After a while I noticed this buzzing everyones talking about. It was especially bad after I installed two more internal drives. It seemed to come and go with HD activity. I pulled up the lever on the back of the machine when it was particularly loud and the buzzing went away. So like some others have noticed it's associated with the HD bays. I took the side off and adjusted the seating of the drives so they were exactly centered Now the buzzing is gone. I'll keep an eye on it. Maybe it will need some kind of silicone bumpers where the bay trays are metal to metal.
More research to come.
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Odd buzzing noise when on BOTH AC & Battery

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What is my problem?

Hi, I had the same problem, at least symptoms. Changing energy usage to low worked fine, but I use graphic intensive software so I need the high performance output. I posted the below information on a separate article as well, but I wanted to share it in case anyone has the same problem and wants a possible better fix.
--- previously posted---
I recently had a loud screeching buzzing noise, not the very faint hard drive or fan sound, but a loud annoying sound. After searching hours online, I found an answer for the problem. (in my case at least)
If you have any speakers plugged into the same energy source (i.e. powerstrip), that may be the problem. I unplugged a set of Sony speakers I had running along the same chain of AC powerstrip outlets, and the noise was gone. The article I found was here: (look for the post by "ST" about midway down this page:
http://bose.infopop.cc/groupee/forums/a/tpc/f/6366055944/m/8671042332/r/38810225 32
(Hope it might help!)

Slight buzzing noise on 13" MBA 2012

Hi,
There are three 2012 MBAs in my family. Two of them are completely silent. The newest one (i7/8gb/256) has a faint buzzing noise that is audible in a quiet room. I figured that it was a bad fan, so I brought it in and had the geniuses replace the fan. With the new fan, it is making the exact same noise that it was making with the old fan. I've had it less than 14 days, so I could return it. But this is my fourth one and the first one with a screen that was good. So given my luck, I don't want to exchange again.
Are there any parts in the computer that could make noise, besides the fan? I'd think that it was normal, if we didn't have two other MBAs with no buzzing noise.
Thanks

"Any thoughts?"
Call AppleCare.
Jim
PowerBook G3 500 Mhz "Pismo"/ 2.0Ghz BlackBook 2GB OWC RAM Mac OS X (10.4.9)

Macbook061 buzzing noise

Hi,
My macbook (model:061) has buzzing noise problem since I purchased it at June 9th this year. There is a high frequency noise continuously coming from the MagSafe plug place located at the upper left corner of the keyboard, especially when using the power adapter to supply energy for working. It annoys me very much and I indeed can not stand it any more, because I am sensitive to such kind of high frequency noise.
I also notice that there are many people found the similar problem on the Macbook or Macbook pro. So it should not be an individual problem. Therefore, I want to know how to get the apple care service at Hong Kong to repair such problem for my macbook as soon as possible.
Thank you.
Regards,
Liang

Call this number in Hong Kong and they can set service up for you.
(852) 2112-0099
-Bmer
Mac Owners Support Group - Join us @ MacOSG.com
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Macbook pro stuck on grey screen and making buzzing noise

hi,
Lately my mac has been playing up (1 year old), ever now and then it would make a funny buzzing noise, coming from the left side.. and i noticed it was running slower than usual. Im Running Mountain Lion and have 566GB of disk space left... after using it for about 5 minutes the buzzing noise would start and it would become unresposive with the spiral beach ball. So i would have to hard restart it. Now ever time i turn it on it gets to a grey screen and doesnt load further. eventually the sound starts again!! i have tried starting it in safe mode and verifying my disk in utilities where everything "seems to be ok" !! someone please help!!!

Ethan997,
define “an average disk”.
Your question regarding fault is akin to asking “is it my fault or the car maker’s fault that my spark plugs no longer work?” — disks, like spark plugs, don’t last forever, and fault doesn’t come into it. Similarly, the fact that your disk (or spark plugs) worked yesterday and doesn’t work today is not a sudden “breakage” — by their nature, they have a finite, variable amount of time in which they do work. This is why (in the case of disks) making regular backups is important; when the disk stops working, you’ll have an easy way to recover from such a situation.
That being said, if your MacBook Pro is still under warranty, you should be able to get a replacement disk from Apple. And even if it isn’t, you could still try reformatting your current disk, to see if you can squeeze some more use out of it — but if the reformatted volume keeps needing to be repaired (and you have the patience to deal with recovering from the same situation again and again), that’s a sure sign that a new disk would be your best option.

IPod making high pitched buzzing noise

I've had my iPod over two years now, maybe three but it's always worked and hasn't had any problems. The other day I connected it to a cheap second hand Pod station that a friend had been lent. The pod station wouldn't play my iPod and nothing much happened so I resolved that my iPod was just too old to work on it and took it back out again. When I tried to turn on my iPod afterwards it wouldn't do anything so I thought that the battery had probably just been drained out and it would be fine when I took it home and connected it to my computer.
However when I did so the iPod did not appear on the desktop or in iTunes and the screen remained blank. I kept trying but the same would continue to happen and I began to notice that now whenever I plug in the iPod a very high pitched buzzing noise comes from the iPod which scares me a little as it's so unusual. I have tried resetting and pretty much all of the suggested solutions on the apple site and in other discussions but none work. Nothing seems to work and the iPod does absolutely nothing. Is there anything at all that I can do or does this mean that my iPod has simply finally had it?
I wouldn't have thought that just a cheap Pod station would be enough to cause such a major problem with it.
Any help would be very much appreciated please!

If a sad iPod icon or an exclamation point and folder icon appears on your iPod’s screen, or with sounds of clicking or HD whirring, it is usually the sign of a hard drive problem and you have the power to do something about it now. Your silver bullet of resolving your iPod issue – is to restore your iPod to factory settings.
http://docs.info.apple.com/article.html?artnum=60983
If you're having trouble, try these steps at different levels one at a time until the issue is resolved. These steps will often whip your iPod back into shape.
Make sure you do all the following “TRYs”
A. Try to wait 30 minutes while iPod is charging.
B. Try another FireWire or USB through Dock Connector cable.
C. Try another FireWire or USB port on your computer .
D. Try to disconnect all devices from your computer's FireWire and USB ports.
E. Try to download and install the latest version of iPod software and iTunes
http://www.apple.com/itunes/download/
For old and other versions of iPod updater for window you can get here
http://www.ipodwizard.net/showthread.php?t=7369
F. Try these five steps (known as the five Rs) and it would conquer most iPod issues.
http://www.apple.com/support/ipod/five_rs/
G. Try to put the iPod into Disk Mode if it fails to appear on the desktop
http://docs.info.apple.com/article.html?artnum=93651
If none of these steps address the issue, you may need to go to Intermediate level listed below in logical order. Check from the top of the lists to see if that is what keeping iPod from appearing on your computer in order for doing the Restore.
Intermediate Level
A. Try to connect your iPod with another computer with the iPod updater pre-installed.
B. Still can’t see your iPod, put it in Disk Mode and connect with a computer, instead of doing a Restore on iPod Updater. Go and format the iPod instead.
For Mac computer
1. Open the disk utility, hope your iPod appears there (left hand side), highlight it
2. Go to Tab “Partition”, click either “Delete” or “Partition”, if fails, skip this step and go to 3
3. Go to Tab “Erase” , choose Volume Format as “MAC OS Extended (Journaled), and click Erase, again if fails, skip it and go to 4
4. Same as step 3, but open the “Security Options....” and choose “Zero Out Data” before click Erase. It will take 1 to 2 hours to complete.
5. Eject your iPod and do a Reset
6. Open the iTunes 7 and click “Restore”
For Window computer
Go to folder “My Computer”
Hope you can see your iPod there and right click on the iPod
Choose “Format”. Ensure the settings are at “Default” and that “Quick Format” is not checked
Now select “Format”
Eject your iPod and do a Reset
Open the iTunes 7 and click “Restore”
In case you do not manage to do a “Format” on a window computer, try to use some 3rd party disk utility software, e.g.“HP USB Disk Storage Format Tool”.
http://discussions.apple.com/thread.jspa?threadID=501330&tstart=0
C. Windows users having trouble with their iPods should locate a Mac user. In many cases when an iPod won't show up on a PC that it will show up on the Mac. Then it can be restored. When the PC user returns to his computer the iPod will be recognized by the PC, reformatted for the PC, and usable again. By the way, it works in reverse too. A Mac user often can get his iPod back by connecting it to a PC and restoring it.
Tips
a. It does not matter whether the format is completed or not, the key is to erase (or partly) the corrupted firmware files on the Hard Drive of the iPod. After that, when the iPod re-connected with a computer, it will be recognized as an fresh external hard drive, it will show up on the iTunes 7.
b. It is not a difficult issue for a Mac user to find a window base computer, for a PC user, if they can’t find any Mac user, they can go to a nearest Apple Shop for a favor.
c. You may need to switch around the PC and Mac, try to do several attempts between “Format” and “Restore”
http://discussions.apple.com/thread.jspa?messageID=2364921&#2364921
Advance Level
A. Diagnostic mode solution
If you have tried trouble shooting your iPod to no avail after all the steps above, chances are your iPod has a hardware problem. The iPod's built-in Diagnostic Mode is a quick and easy way to determine if you have a "bad" iPod.
You need to restart your iPod before putting it into Diagnostic Mode. Check that your hold switch is off by sliding the switch away from the headphone jack. Toggle it on and off to be safe.
Press and hold the following combination of buttons simultaneously for approximately 10 seconds to reset the iPod.
iPod 1G to 3G: "Menu" and "Play/Pause"
iPod 4G+ (includes Photo, Nano, Video, and Mini): "Menu" and "Select"
The Apple logo will appear and you should feel the hard drive spinning up. Press and hold the following sequence of buttons:
iPod 1G to 3G: "REW", "FFW" and "Select"
iPod 4G+ (includes Photo, Nano, Video, and Mini): "Back" and "Select"
You will hear an audible chirp sound (3G models and higher) and the Apple logo should appear backwards. You are now in Diagnostic Mode. Navigate the list of tests using "REW" and "FFW". The scroll wheel will not function while in diagnostic mode. For further details on Diagnostic mode can be found at http://www.methodshop.com/mp3/ipodsupport/diagnosticmode/
Try to do the 5in1, HDD R/W and HDD scan tests. Some successful cases have been reported after the running the few tests under the Diagnostic mode. In case it does not work in your case, and the scan tests reports show some errors then it proves your iPod has a hardware problem and it needs a repairing service.
B. Format your iPod with a start disk
I have not tried this solution myself, I heard that there were few successful cases that the users managed to get their iPod (you must put your iPod in disk mode before connecting with a computer) mounted by the computer, which was booted by a system startup disk. For Mac, you can use the Disk Utility (on the Tiger OS system disk), for PC user, you can use the window OS system disk. Try to find a way to reformat your iPod, again it does not matter which format (FAT32, NTFS or HFS+) you choose, the key is to erase the corrupted system files on the iPod. Then eject your iPod and do a Reset to switch out from Disk Mode. Reboot your computer at the normal way, connect your iPod back with it, open the iPod updater, and hopefully your iPod will appear there for the Restore.
If none of these steps address the issue, your iPod may need to be repaired.
Consider setting up a mail-in repair for your iPod http://depot.info.apple.com/ipod/
Or visit your local Apple Retail Store http://www.apple.com/retail/
In case your iPod is no longer covered by the warranty and you want to find a second repairing company, you can try iPodResQ or ifixit at your own risk
http://www.ipodresq.com/index.php
http://www.ifixit.com/
http://www.rapidrepair.com/shop/g4-ipod-parts.html
Just in case that you are at the following situation
Your iPod warranty is expired
You don’t want to pay any service charges
You are prepared to buy a new one
You can’t accept the re-sell value of your broken iPod
Rather than leave your iPod as paper-weight or throw it away.
You can try the following, but again, only do it as your last resort and at your own risk.
Warning !!!! – It may or may not manage to solve your problem, and with a risk that you may further damage your iPod, which end up as an expensive paper weight or you need to pay more higher repairing cost. Therefore, please re-consider again whether you want to try the next level
Last Resort Level
1. . Disconnecting the Hard Drive and battery inside the iPod – Warning !! Your iPod warranty will be waived once you open the iPod.
In Hong Kong there are some electronic shops offering an iPod service for Sad iPod, the first thing they do is to open up the iPod’s case and disconnecting the battery and the Hard Drive from the main board of the iPod. Wait for 5-10 minutes and reconnecting them back. The reason behind which I can think of is to do a fully reset of a processor of the iPod. In case you want do it itself and you believe that you are good on fixing the electronics devices and have experience to deal with small bits of electronic parts, then you can read the following of how to open the iPod case for battery and HDD replacement (with Quicktimes)
http://eshop.macsales.com/tech_center/index.cfm?page=Video/directory.html
2.Press the reset button on the Hard Drive inside the iPod – Suggestion from Kill8joy
http://discussions.apple.com/thread.jspa?messageID=2438774#2438774
Have I tried these myself? No, I am afraid to do it myself as I am squeamish about tinkering inside electronic devices, I have few experiences that either I broke the parts (which are normally tiny or fragile) or failed to put the parts back to the main case. Therefore, I agree with suggestion to have it fixed by a Pro.
2. Do a search on Google and some topics on this discussion forum about “Sad iPod”
Exclamation point and folder and nothing else
Spank your iPod
http://www.youtube.com/watch?v=3ljPhrFUaOY
http://discussions.apple.com/thread.jspa?messageID=3597173#3597173
Exclamation point and folder and nothing else
http://discussions.apple.com/thread.jspa?messageID=2831962#2831962
What should I do with my iPod? Send it or keep it?
http://discussions.apple.com/thread.jspa?threadID=469080&tstart=0
Strange error on iPod (probably death)
http://discussions.apple.com/thread.jspa?threadID=435160&start=0&tstart=0
Sad Face on iPod for no apparent reason
http://discussions.apple.com/thread.jspa?threadID=336342&start=0&tstart=0
Meeting the Sad iPod icon
http://askpang.typepad.com/relevanthistory/2004/11/meeting_thesad.html#comment-10519524
Sad faced iPod, but my computer won’t recognize it?
http://discussions.apple.com/thread.jspa?messageID=2236095#2236095
iPod Photo: unhappy icon + warranty question
http://discussions.apple.com/thread.jspa?messageID=2233746#2233746
4th Gen iPod Users - are we all having the same problem?
http://discussions.apple.com/message.jspa?messageID=2235623#2235623
Low Battery, and clicking sounds
http://discussions.apple.com/thread.jspa?messageID=2237714#2237714
Sad faced iPod, but my computer won’t recognize it
http://discussions.apple.com/thread.jspa?messageID=2242018#2242018
Sad iPod solution
http://discussions.apple.com/thread.jspa?threadID=412033&tstart=0
Re: try to restore ipod and it says "can't mount ipod"
http://discussions.apple.com/thread.jspa?threadID=443659&tstart=30
iPod making clicking noise and is frozen
http://discussions.apple.com/thread.jspa?messageID=2420150#2420150
Cant put it into disk mode
http://discussions.apple.com/thread.jspa?messageID=3786084#3786084
I think my iPod just died its final death
http://discussions.apple.com/thread.jspa?messageID=3813051
Apple logo & monochrome battery stay
http://discussions.apple.com/thread.jspa?messageID=3827167#3827167
My iPod ism’t resetting and isn’t being read by my computer
http://discussions.apple.com/thread.jspa?messageID=4489387#4489387
I am not suggesting that you should follow as well, but just read them as your reference. You are the person to make the call.
Finally, I read a fair comments from dwb, regarding of slapping the back of the iPod multiple times
Quote “This has been discussed numerous times as a 'fix'. It does work, at least for a while. In fact I remember using the same basic trick to revive Seagate and Quantam drives back in the mid to late 1980's. Why these tiny hard drives go bad I don't know - could be the actuator gets stuck in place or misaligned. Could be the platter gets stuck or the motor gets stuck. 'Stiction' was a problem for drives back in the 80's. Unfortunately the fix can cause damage to the platter so we temporarily fix one problem by creating another. But I know of two instances where a little slap onto the table revived the iPods and they are still worked a year or more later.”UnQuote

MBP 15'' retina display making a constant buzzing noise

I purchased my first MBP about three months ago, I have been wanting one for years and FINALLY
saved up enough, I use it everyday and have never had a problem, until now..
There is a weird buzzing noise, it's super annoying and it's constant..
I just tipped it upwards to listen, and it started making a horrible scratching noise, along with the buzzing. (not doing that again)
However the buzzing is still constant, the only time it stops is when it is shut off completely.
I just want it to go away!!!!!
I'm absolutely heartbroken about this.
does anyone have any suggestions on what my next move should be?
It is sunday so all the mac stores will be closed by the time i am off work.
Should I stop using it? I don't want to make it worse.
HELP! PLEASE!
,Molly

Are you using a case or something?
Do a reset (Hold Sleep/Wake and Home buttons about 10 secs or more till Apple logo appears, ignore the Slide to Power Off that appears)
Note: You will not lose any data.

Ultrabook/Notebook freezing and making loud buzzing noise

I just received via UPS a HP Pavilion 11 x2 PC 11-h010nr for my daughter for Christmas. I decided to let her open it as her one before Christmas present and I am glad I did. She went into xbox music to listen to her new beats audio sound. On about the 3rd song the loudest annoying buzzing noise came out of the screen portion and the screen was frozen (she had it detached from the keyboard). She hit the power button and the noise stopped. She got back into xbox music and about the 2nd song this time it did it again. She started to cry and very upset because she thought it was broke and would take a very long time for us to get it fixed and she gets a replacement. Needless to say her Christmas has just turned into a really bad Christmas. Also today I brought the notebook with me to work to see if the problem continues and as I was putting the song on Pause/Play the noise occured, the screen did not freeze but the noise did occur.

Hello mickeymom44,
The notebook would still be covered by the warranty, I recommend calling our technical support at 800-474-6836. If you live outside the US/Canada Region please click the link below to get the support number for your region. http://www.hp.com/cgi-bin/hpsupport/index.pl
Thank you and Happy Holidays!
HevnLgh
I work on behalf of HP
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Mac Performa 405 buzzing noise

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