Viewing data for Noisy Screen

Total: 134

3.06C2D: 63
2.66i5: 30
2.8i7: 33


Screen Size
21.5": 55
27": 79


Hard Drive Size
500GB": 18
1TB": 110
2TB": 6

Batch (Week Built)

09-40: 2
09-41: 1
09-42: 5
09-43: 7
09-44: 10
09-45: 2
09-46: 6
09-47: 4
09-48: 8
09-49: 7
09-50: 5
09-51: 9
09-52: 16
09-53: 3
10-01: 5
10-02: 3
10-03: 1
10-04: 7
10-05: 4
10-06: 5
10-07: 3
10-08: 4
10-09: 3
10-11: 2
10-12: 2
10-13: 2
10-14: 1
10-15: 2
10-17: 1
10-21: 1
10-25: 1
10-27: 1
10-37: 1

Fedex: 11
UPS: 29
DHL: 39
Store: 55

Australia: 10
Austria: 2
Belgium: 1
Canada: 5
Denmark: 2
Finland: 5
France: 3
Germany: 31
Hong Kong: 1
Indonesia: 1
Italy: 12
Japan: 2
Korea: 1
Luxembourg: 1
Netherlands: 1
New Zealand: 1
Norway: 1
Portugal: 1
Singapore: 1
Spain: 7
Swedan: 4
Switzerland: 1
UK: 11
USA: 29

Source Specs Comments
derbyStar16 21.5" 3.06 Core2Duo 1TB I just bought and received a new 21.5'' iMac and love it but the screen is making a high pitched noise, similar to a dog whistle. It's that sound that isn't loud but pierces through your brain. And the brighter the backlight is, the louder it gets.
heathsnow 21.5" 3.06 Core2Duo 1TB Around 70% brightness is where the high pitch noise kicks in. It's gone at full brightness and low brightness. I'm on phone w/tech support now. I think it's a capacitor in the screen making the noise.
steve_lux 27" 3.06 Core2Duo 1TB Got my second 27inch and they both make that noise. I would love to hear what tech support says.
swampystorm 21.5" 3.06 Core2Duo 1TB I have notice exactly the same problem! High pitched whining sound decreased by reducing the brightness. Sound is quiet and you have to listen for it. This is my third Imac.
Garciam_sa 21.5" 3.06 Core2Duo 1TB At full brightness and the very lowest brightness settings, the sound goes almost entirely out of my range of hearing but in between, it becomes rather prevalent. It does not seem to be worsening though
Humis 21.5" 3.06 Core2Duo 1TB the noise level goes down when you rise the brightness, and it disappears totally if the brightness level is under half.
jeffvb 21.5" 3.06 Core2Duo 1TB Right away it reminded me of that sound some old TVs make when they are turned off. (of course my biggest pet-peeve sound)
Reuben Feffer 21.5" 3.06 Core2Duo 1TB it makes as high-pitched whistle noise! It's only at the top three brightness settings, and the sound is very quiet and VERY high pitched. The noise gets higher in pitch, the brighter you set the screen.
Nebraskoenig 21.5" 3.06 Core2Duo 1TB Everyones ears are different. For me, raising the brightness increased the frequency, but it is still audible. It just is not as annoying at that frequency.
Zeta9 21.5" 3.33 Core2Duo 1TB Top 2 brightness levels, sound is gone/weak. Go down near half and sound gets louder and extremely annoying. I noticed this the second day.
21.5" 3.06 Core2Duo 1TB AppleCare replaced it Noisy hard drive
Woaha 21.5" 3.33 Core2Duo 1TB Whistle sound appears when around 50% brightness.
Woaha 21.5" 3.33 Core2Duo 1TB Replacement iMac that still has the brightness related screen noise + dead pixel. Finally got a refund, even though it was a BTO configuration. + 1 Dead pixel
Lucas Adam 21.5" 3.06 Core2Duo 500GB My 21.5 iMac 3.06Ghz Core2Duo, 500GB Hdd/... the Display is makeing funny noise, when setting higher/lower backlighting...
mwhiegl 21.5" 3.06 Core2Duo 1TB High pitch noise except for full brightness or very lowe brightness.
MattCrellin 21.5" 3.33 Core2Duo 1TB When running Windows the whistle disappears... Thats right, if I hold down alt so I can choose which OS to load I here the distinct whistle however as soon as windows begins to load the whistle disappears. I can run windows for hours without trouble -... Read More
Cbird2009 21.5" 3.33 Core2Duo 1TB I decided to keep my iMac and learn to deal with the noise. I can definitely hear the whistle if Iím within six inches of the machine. I canít hear the noise from where a usually sit. What annoys me is that if Iím using the machine for an extended period... Read More
Beatnick 21.5" 3.33 Core2Duo 1TB I took my 21.5" to the Apple store after speaking to technical support and the guy there did not hesitate to diagnose the whistle as a fault. He said it was the inverter(? is that right) and offered to fix it, but then offered me a replacement which I... Read More
Charzzy 21.5" 3.33 Core2Duo 2TB I've been using my replacement iMac for a few days now and it still has the high-pitch whistle when the brightness is in the middle, although it is not as loud as the previous iMac (which was headache-inducing!) so I think I'm going to keep it as it is... Read More
PaoloS 21.5" 3.06 Core2Duo 500GB just received my new iMac 21.5" and it also has this very annoying high pitched whistle (like old CRT TVs). Serial W8949, hence made in Shanghai in week 49, if I'm not wrong. Differently from what others have experienced, changing brightness from min... Read More
Pinthea 27" 2.66 Quad i5 1TB So I'm on my 2nd i5 now. Have had it since 11/30/09, puchased it in my local Apple Store. Today I called AppleCare because the high pitched whiney noise you get when reducing the brightness below 100% is finally to the point where I'm tired of it and... Read More
mazstar1980 21.5" 3.06 Core2Duo 1TB Just got a call from Apple tech who says Apple unofficially acknowledge the problem exist and are working on a software fix. I don't hear a thing under Windows.
21.5" 3.06 Core2Duo 1TB Screen almost quiet at full brightness, peak of high-frequent noise at 50-70% brightness
AntB1109 21.5" 3.06 Core2Duo 500GB Whistle at mid-brightness settings. Just about liveable with, but would much prefer to get fixed. Intend to leave for a week or two then take back to store.
21.5" 3.06 Core2Duo 500GB noisy screen
21.5" 3.06 Core2Duo 500GB I bought it from Apple Store, but don't think it was shipped from China. Also a slight yellow tint on the right side of the screen
MarvMuc 21.5" 3.06 Core2Duo 1TB Two days ago i recieved my new iMac 21.5" in the standard 1TB configuration. And yes, there is a high-frequent noise f***ing up my ears. Factory: W8 Production Week: 48 The sound is away at full display brightness, and gets louder around 50-70% of... Read More
SuAlfons 21.5" 3.06 Core2Duo 1TB My iMac 21.5 (ATI graphics) is build in calendar week 46, Plant W8. Ordered and bought in a well known German media market chain - it took them 2 weeks to deliver. It makes the high pitched screen noise, but I can only hear it when all others in the... Read More
27" 3.06 Core2Duo 1TB Screen was noisy. Had to bring it back
21.5" 3.06 Core2Duo 1TB It isn't dreadfully loud, but it bugs the hell out of me.
21.5" 3.06 Core2Duo 1TB maybe tint problem, but if, it's weak. Got to recheck
27" 2.66 Quad i5 1TB Noisy screen from the first time I started the unit. The second time I booted up the unit the screen was dead. I returned it and got an instant replacement from my local Apple store. dead screen
27" 2.8 Quad i7 1TB 2 vertical green lines on the center/left of the monitor
27" 2.66 Quad i5 1TB Yellow discoloration at the bottom of the screen, electric buzzing noise when brightness is turned to hi.
narcosis 27" 2.8 Quad i7 2TB everything is fine APART from the damn display. SEEMS to affect only primary display; Secondary display does not seem to flicker. Also - reseting PRAM "seems" to help. Offset Screen display problem; bottom scrolls over to top
27" 2.8 Quad i7 1TB Screen starts a buzz noise when the brightness is turned down or it dims itself. Only happens when machine is hot
21.5" 3.06 Core2Duo 1TB yellow tint on the lower part of the display and noise when turning up the brightness! Hoping for a software-update!
27" 3.06 Core2Duo 1TB The error shows about 1 hour after use. Offset Screen Display The whole screen gets "shifted" down (offset) with the bottom part of the screen wrapping onto the top of the screen.