Viewing issue data for screen size 21.5"

Summary (209 total)

3.06C2D: 182
3.33C2D: 27


Hard Drive Size
500GB": 97
1TB": 110
2TB": 2
Batch (Week Built)
09-39: 4
09-40: 3
09-42: 7
09-43: 7
09-44: 16
09-45: 9
09-46: 8
09-47: 15
09-48: 14
09-49: 16
09-50: 16
09-51: 15
09-52: 10
09-53: 5
10-01: 7
10-02: 7
10-03: 7
10-04: 4
10-05: 3
10-06: 3
10-07: 3
10-08: 2
10-09: 3
10-10: 1
10-11: 2
10-12: 1
10-13: 1
10-14: 3
10-15: 1
10-16: 3
10-19: 1
10-20: 1
10-23: 3
10-25: 2
10-28: 1
10-35: 1
10-40: 1
10-44: 2
10-47: 1

Source Specs Comments
jogness 21.5" 3.06 Core2Duo 1TB I have a new 21.5" iMac (ATI Radeon HD 4670) and am experiencing the exact same flickering issue
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.
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.
21.5" 3.06 Core2Duo 500GB Apple Store replaced with new one.
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
21.5" 3.06 Core2Duo 1TB extremely noisy optical drive + noisy hard drive
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...
21.5" 3.06 Core2Duo 500GB Contacted reseller today. Got the message that Apple stopped shipping iMacs altogether until quality issues have been resolved. Not sure ifthis only applies to The Netherlands. Apple stops shipping iMacs.
21.5" 3.06 Core2Duo 1TB Dead Pixels 21.5" 3.33 Core2Duo 500GB From 0 to 50% brightness only. Not >50%
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
sirjoseph 21.5" 3.06 Core2Duo 1TB Noticing that throughout the day that the yellow is spreading. Specifically across the bottom from the right to left. Definitely can't wait to get this resolved.
Schwa72 21.5" 3.06 Core2Duo 1TB Another data point for what it's worth...I went to Best Buy and checked out the 21.5" and 27" iMacs they had on display. The 21.5" definitely had the yellow tinge and the 27" definitely did not have the tinge. The smaller iMac was a week 39 model and the... Read More
dratter 21.5" 3.06 Core2Duo 1TB I noticed the yellow tint in the lower right corner this morning. I called my wife to look at it. She didn't see it at first, but then noticed after I Started Textedit and moved that window from the upper left of the screen (white) to the lower right... 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
sirjoseph 21.5" 3.06 Core2Duo 1TB First let me say that the Genius Bar and Apple store were awesome to work with. They swapped out my iMac even though I bought it from Best Buy. That being said, I fired up my new iMac and the yellow is still there. This time it is predominantly on the... Read More
Jose I. Lopez 21.5" 3.06 Core2Duo 500GB I bought a 21.5" iMac in my country (Uruguay) through an Apple reseller. It came with 7 faulty pixels (4 black and 3 "blurred"). I asked the reseller if they have the 14-days return policy from Apple, but they told me they don't.
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
Mattias_N 21.5" 3.06 Core2Duo 1TB I received my iMac 21.5" (week 46) last Thursday and there are a difference in the shade of light colors between the upper and the lower part of the screen. when I look at a white or light colored background (like this web page for example), the top... 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.
Shaun Priest 21.5" 3.06 Core2Duo 500GB Basically before I put my iMac to sleep at night, I put the brightness down to 1 notch, so when I wake up in the morning and check my email the brightness doesn't damage my eyes! I done this the first night I got the iMac and the next morning, when I woke... Read More
coxorange 21.5" 3.06 Core2Duo 500GB I also bought two new iMacs 21.5" with ATI Radeon HD 4670 (in the UK). (I post this here because the other thread is for the 27".) One had that flickering problem - the other one was OK. The defective one also made a humming noise (top, right side) and a... Read More
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
Ace12 21.5" 3.06 Core2Duo 1TB Wireless issues: It detects my router, but it randomly connects and disconnects. Sometimes its really slow, sometimes it wont connect at all. I noticed, when i first set up my imac, the wireless worked fine, i.e.. the speed was fast and no connection... Read More