Imac 24 LCD

I have imac 24 Intel C2D White of which LCD has broken. The Part No. Mentioned on the LCD is LM240WU2-SL-A1.
I wish to know what is the difference between the one mentioned above & mentioned below as all of them are for Itel C2D 24 IMAC
LM240WU2-SL-B1
LM240WU2-SL-B2
LM240WU2-SL-B3

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Imac LCD Help

Hi Guys, well its been almost 5 months that lines have started occurring on my Imac LCD.. however i know its expensive to repair so i did not care initially. However recently i bought the cable to mirror another lcd display to my imac as the LCD started to have alot of flickers.. This is my question.. anyone knows if my Imac LCD displays blacks out.. do you think the mirroring of LCD will be affected?

It mostly depends on where the problem is. If the problem is the video controller, then, yes if one display goes out the other will also, because the controller feeds both the internal LCD and the external display. If the problem is just the internal LCD display itself, if it goes out your external display may still work.

Faint horizontal lines accross iMac lcd

Had a 24" iMac that developed faint horizontal lines across the lcd that got progressively darker the longer the computer was on. Had the lcd replaced by Apple twice, but after a couple of weeks the problem returned. They gave me a new iMac, but a month in I have the same problem with the new machine. Has anyone encountered this problem? Is it an inherent issue with iMac lcds or is it something external affecting my machine? And I'm not talking poltergeist. Help, want this fixed.

We have a 20" imac Core Duo that was purchased summer 2006 - then about 5 or 6 months ago, it started developing horizontal lines across applications (Safari, Mail, etc) and the desktop - sometimes they would go away, sometimes not... I thought is was some video driver conflicting, upgraded to snow leopard, went to the genius bar, etc... but lately it got worse to the point that it started locking up every day... this after going weeks or months without a reboot and over 3 years having almost zero crashes...
I read in a forum where the video chip (GPU - graphics processing unit) was heat sensitive and thought that after 3+ years, maybe it was dusty in there... I installed the iStat widget to monitor the temp of the GPU and installed a fan control (software) where you can increase the minimum speed of the hard drive fan (allegedly located above the GPU). I also put the end of the vacuum on the fan vent just above where the power cord goes into the back of the monitor and let it run for a while hoping to clean things out...
5 days later - zero display issues, zero hangs and zero crashes - and the GPU runs an average of 25 degrees cooler than before. This after a genius bar guy told me that it probably needs a new display board. Good Luck!

Is it possible to replace an 2011 iMac LCD with one from an HP Z1 desktop?

The left side of my LCD screen is not receiving power, a problem that was addressed in one of the other threads, however I was unable to fix it and now need to replace the LCD completely. The HP Z1 all in one computers uses the same screen as the iMac so I'm thinking of buying this one here on ebay, http://www.ebay.com/itm/301417061741?_trksid=p2059210.m2750.l2649&ssPageName=STR K%3AMEBIDX%3AIT, does anyone know if it'll be compatible with the iMac? Thank you for your input

You should talk to your Apple Store. The newest iMacs are very difficult, if not impossible, for the average person to repair. The glass on previous iMacs could be replaced DIY but the new slimmer version is supposed to be specially glued together.

24" iMac LCD no backlight

I was just told that the inverter board is probably bad on the LCD of my 24" iMac. The screen is working, it just has no backlight so it is dark... I was wondering what my options are... fix the LCD inverter, replace the LCD inverter, or buy a whole new screen.
I have a 2007 24" iMac.
M-

Hi!
I am connecting via a D-Link DIR655 11n capable router and have come across the same problem as lots of others on my Leopard based 24" white iMac. There was no problem when I had Tiger installed. I discovered that by turning off WPA (and probably any other) encryption it works. So now I have an unsecure network which is giving me nightmares.
I read elsewhere that the work around might be to set things up so that MAC address is used as a filter. I've not tried it yet. One of these work arounds might work. Still I think its time Apple "got their finger out" and resolved this problem that's plaguing many Mac owners.

IMAC LCD Display

One of my IMACS (24 in. 2.4GHZ Intel Core 2 Duo) experienced an LCD that was dark in the upper 1/3 of the screen. The OS (Snow Leopard) seemed to operate normally. Since I had a warranty from Best Buy, I took the IMAC to them for repairs. After one month they returned it with a recertified hard drive (listed at $23.93) . The work order stated that it had passed all tests. In the process of importing data to the IMAC, which is in my home network, the system test for hardware was passed. I had a problem with an admin. password but, with help from Apple tech support (under the S. Leopard warranty) I was able to solve it. Two days after the IMAC was returned from the Geek Squad (last night), the LCD went dark agin in the same area. I shut the system down. This morning, at log-in, the screen was clear, except for a small area in the middle of the screen. All signs of darkness have cleared up and I have the IMAC under observation for the day. Has anyone experienced a similar problem? Any suggestions would be appreciated.

Allen so your telling me if I replace the LCD it will solve my problem?
Absolutely not!
A new display will only fix the line if the line is due to the display itself and not the cabling or another part of the video subsystem.
Like Mirian said, you MUST have the probelm professionally diagnosed before jumping to a soution. If there is a cable problem but you replace your LCD, the line will still be there and you will have wasted a lot of money. The display units are nether cheap or easy to find.

IMac LCD not working after Leopard install

So I have a family pack and installed leopard on three computers so far and they all took forever, so I went to install on my iMac G4 1.25, 1 gig RAM, and I got the install started and when I returned the screen was black. I restarted and nothing. I finally got the computer hooked up to a plasma I have at my house and sure enough the install went just fine. Long story short, my comp is just fine, the LCD just doesn't show anything. The vid card is fine if it shows up on an external monitor, the LCD is connected and functioning because I can adjust the brightness and that still works, just no video
I called AppleCare and was on the phone for, no joke, 1:37:39, WOW, took forever, the guy ended up telling me that it is out of warranty and I need to pay to have it fixed. Anyone have any ideas or what to do?

Anyone have this similar problem? or know what I need to do?

IMac LCD screen replaced, Blue Screen startup

Hi there, I just had the LCD screen replaced on my late 2007 Aluminum iMac today (due to a permanent red vertical streak) by an Applecare certified technician. He did a meticulous job with the replacement, and the iMac booted up just fine afterwards. About an hour later, though, I tried starting up the iMac and after the grey screen with the Apple logo it gets stuck on a blue screen with a constantly spinning pinwheel.
Now I tried everything, booting up in Safe Mode, Single User Mode, resetting the PRAM, FSCK, Disk Utility using Disk Repair, unplugging the power cord for 30 seconds, etc. and nothing seems to work. It just gets stuck on a blue screen whenever it tries to boot up.
Just wanted to see if there is anything else I could try out before I give Apple a call tomorrow, if this boot up problem is a result of the new LCD screen replacement or what? Any help or insight in the matter would be greatly appreciated, thanks.
Update: I should note that right now I'm in the (lengthy) process of restoring from a Time Machine save to see if that helps out in any way.

You could try the following first, but a repair may be required.
iMac G5: Fails to startup (From an article at MacFixit)
Some users are reporting an issue where iMac G5s fail to properly startup -- apparently at a hardware level -- never reaching the Mac OS X startup splash screen (Apple logo with a spinning progress indicator).
Note that in cases where the system does reach the Mac OS X startup splash screen or further progression but stalls, software issues may be to blame.
Potential fixes
Disconnect external devices External devices -- especially those that draw power from the system -- can cause issues with startup that manifest either at the beginning of or later in the boot process. Try temporarily any external FireWire or USB devices then re-attempt startup and check for persistence of the issue.
Reset SMU Although this workaround was not successful in Connors' case, resetting the iMac G5's SMU (system management unit) as described in Apple Knowledge Base article #301733 can resolve a variety of power-related problems, including sudden-onset startup failure.
Check power cables Check your power cord for a loose connection. As noted in the aforementioned reader case, unplugging and re-plugging the power cord can sometimes result in a successful startup -- likely the result of a more snug fit.
Also, power cables can become defective or ship in such a state.
Try exchanging the power cable from a problematic machine with a system that starts up properly to eliminate this as a potential cause.

Dirt inside iMac LCD

I got my iMac back in 2011. In early 2012 I started to notice small black smudges on the top right corner, out of my 90 day phone support and more than 1 hour away from any Apple store I ignored the problem hoping it would eventually go away. In the last month or so, the problem has become significantly worse, making it almost impossible to focus on the screen without seeing this large patch of dirt in the screen. According to Apple it would cost $300+ to replace the LCD. So does anyone think I should try the fix on MacRumors which involves taking apart the physical LCD, or should I take it to Apple and see if they will replace it with the knowledge that it's a major design flaw?

If you bought AppleCare this will be covered....did you every buy it? If not you will have to take it to an Apple Store or AASP. As for a flaw, that's why warrantees and AppleCare exist, don't expect anything for free because you ignored the issue and may not have purchase AppleCare.

Alternating pixels turned-off of iMac LCD

I have a 20" iMac Core2Duo from 2006 where half of the internal pixels just turned off (look like black vertical lines across the entire screen, where it alternates from a vertical line of pixels turned on to another turned off, etc). It doesn't look to be a software problem since I booted up from a Ubuntu linux CD and the lines were still there. Changing the video resolution and resetting the PRAM do not make any difference. This seems to be different than the other lines people on these boards complain about regarding the iMac.
I attached an external monitor and it works fine (no lines), but was wondering if anyone else had something similar happen and if it was a graphic card problem, blacklight, connector, etc? Any tips to help me determine to spend the money to look for the problem or not would be appreciated.

The problem is that it does not work with the 'Apple ram' either. And I have tested the ram in my Macbook with succes, so that does not seem to be the problem.
I just turned it into another service provider today, but I really doubt that they will come to another conclusion...
The problem is that Apple got no shop in Denmark, and therefore Apple need to send a CAS number to hte service provider to legimitate that they can do the repair without any cost for the consumer. But I dont quite know whenever the service provider shall request the CAS number from apple upon finished diagnose or I shall contact Apple and then convince them that they shall send the CAS to the service provider. :/
But do anybody know if I am the only one? I have seen on this forum that there is a few but is it like a big problem?
/morten

How to remove and/or reuse iMac LCD?

I have a 24" iMac with a quickly fading motherboard. The display is still flawless and I want to either remove the screen and mount it in a new bezel or convert the entire computer into a dvi or hdmi secondary monitor (removing or bypassing the other components like motherboard, hard drive, ram, etc.). Anyone have ideas? I intend to buy another machine, but this beautiful display should not go to waste.

It doesn't need to go to waste however it does rely on the main logic board to work. In your case I would part out the computer and sell the good components including the display. For disassembly instructions Google is your friend.

IMac 20" A1224 (EMC 2133) LCD bright grey but no video

Hi All,
I have an iMac 20" A1224 (EMC 2133) LCD boots up bright grey but no video, not even the able logo or spinning gear. After waiting the normal amount of time, the machine responds to keyboard input, i.e., I can change screen brightness and get the machine to beep at me by hitting various keys. I attach the external monitor and it works perfectly.. shows the desktop background after the computer boots up. I even booted the machine up to Ubuntu 11.04 GNU/Linux and was able to surf the Internet while looking at the externally attached display. All the while, the iMac LCD stays bright grey. The only time I see even so much as a flicker is when the computer boots up to GNU/Linux, where it flickers quickly once but then returns to bright grey.
I've checked all the connections, I've run the command+option+p+r, I've unplugged the machine for over 12 hours and held the power button in and turned on power (to reset SMU), and I've disconnected the hard drive (shows a blinking folder if I have the external monitor attached and boot with the LVDS cable detached). I've even checked the LED lights - all four are lit.
Very Frustrating!
So now I'm left with trying to swap out parts.. An expensive idea to say the least!
$24 Apple 922-8167 Cable, LVDS
$250 ATI Radeon GPU
$190 Apple iMac Intel 20" LCD Screen M201EW02 v.B
Does anyone know a way that I can test to make sure which part to replace?
Thanks!
Shannon VanWagner
humans-enabled

Oh and for those who might end up in this same situation... I was able to get the externally attached monitor to be the main screen by first unplugging the LVDS connection (from the LCD display to the motherboard), then booting with the external monitor on and attached. This is nice because now I'm able to use the computer as normal (while viewing it in the external monitor), and I can run a time machine backup. I tried mirroring displays, gathering windows, changing the resolution and brightness and nothing has yet brought back the video on the LCD panel.
I still wish there was some type of testing software to check the GPU and tell me it's working perfectly... because then I could purchase the replacement LVDS cable / replacement LCD with confidence that replacing those items would fix the problem. Apple should attach these LCD panels with a DVI or HDMI connection internally... this way one could always (and easily) attach a monitor to the main output port and be able to easily isolate whether a video problem exists with the LCD/cable, or the GPU/Logic Board.
Also, what's up with the replacement ATI GPU being $250+? That's ridiculous because I can buy a decent 3d-gaming capable PCI-X 3d graphics card for my GNU/Linux computer for about $80.

Want to use iMac G5 LCD as PC monitor

Hello, here is my problem:
I have iMac G5 that I can't use it (logic board problems, can't finish OS installation) but LCD works just fine! Inverter works fine too.
I want to use iMac LCD instead of my regular (still CRT) monitor.
My question is: is it possible to cut off THIS side of LVDS cable (cable that connects logic board and LCD) and instead that little 30-pin connector put DVI connector so I can connect VGA/DVI output from my PC to that (new) DVI connector that goes into LCD? I hope you understand what I want to do!
If someone has other idea how to use iMac G5 20inch LCD like PC monitor, please post it.
Message was edited by: TDKZG

I also would like to try and do the same thing.
I have a g5 imac ALS... just had the motherboard recapped and power supply replaced. It works but freezes up intermittently and the fans are just insane...throttling up to max every 30 seconds for a couple minutes fo no reason (temp is ok), the last time I turned it on I realized that it has become pretty much unusable as a reliable family server. We keep the computer on our kitchen counter and the smaller G5 fits well and matches a whole lot better since it's white.
I don't mind cutting or soldering...is it possible to tap into the main cable? It would make a sweet pairing with a new mac mini.

Hooking iMac to external display when LCD is broken

Per the Genious bar people at the Apple store, the LCD display on my iMac is broken. She told me I could hook it up to an external display and use it or I could get it fixed. I decided to hook it up to an external display, but from searching other forumns, it looks like it is only extending what is on my desktop and not mirroring it because all I see is the background of my desktop, no icons. Apparently, I need to go into System preferences and change something. How can I do this if nothing is showing on the iMac LCD display? Is there a shortcut key on the keybord or something?

CMD F1 was the keyboard shortcut....

IMAC 27" random screen blackout

my 8 month old iMAC 27" quad core machine recently started to "black out" Screen goes black for no reason and the only remedy is to hit the power button - usually twice. This will bring the system back to where it was, all open APPs etc. will be exactly where you left them. I also tested the speaker volume up/down keys to see if the "system" was still functioning during a screen black out. THe CPU etc. is still avtive as the speaker volume when maxed out will "beep" at you.
I called tech support - they had me do some special resets of power control and PRAM - no luck
I took the system into Apple store for Genius Bar appointment - 2 hours of running the mac in the store, of course it did not black out....however, they ran other diagnostics and ran a bunch of utilities, graphics etc. to max the RAM and CPU load, heating up the system but still nothing happened. they suggested I reistall the OS by doing a hard boot and holding down the command key to prompt me to re-install the OS from the "cloud". This did not solve the problem either.
I then took the system back to Apple and told them to fix it or replace it. They kept the system for 5 days, and replaced
item 661-5948 Board, Logic, 2.7GHZ, Quad Core i5
item 661-5967 card, video, AMD radeon HD 6770M, 512M
item 661-6615 LCD panel 27 inch with BLC
and labor: TOTAL COST $1183.32
This was all under the first year warranty so I did not have to pay for this out of pocket. If you look at the list of repairs, they effectively gutted my iMAC except for the HDD and enclosure. Ahhhhh at last I thought I would be back to a fully functional iMAC. Two days after getting home and just browsing the internet the blackouts started again.
Once the system blacks out the first time (which appears to be a completely random amount of time) it will then black out more frequently after hitting the power button.
It's time to call Apple again and demand a new system, wondering if the iMAC LCD crystal / video components are suffering from a manufacturing defect....as it seems the new components they replaced are suffering from the same issue.
APPLE - would appreciate you recognizing this problem and working on resolution.
thanks,
Share holder and completely converted MAC power (family) users!!!!

Hi, I hope you find this information useful:
A few years ago, we purchased iMac 27" 11,3 (Mid-2010) (with i7 2.93Ghz, ATI 5750 1GB VidRam, etc.) for our offices and software development team. They were originally shipped with Snow Leopard and worked as expected and without any problems. However, a year later, we upgraded to Lion and all of machines immediately exhibited the same problem: the screen would go to sleep by itself and would require a hard reboot or sleep on/off. (Only the screen was asleep and the rest of the iMac continued to function; this was confirmed by screen sharing to the machine.)
Due to the severity and impact on our business, we immediately contacted Apple and their genius bar staff in New York/SoHo. They were unable to determine the root cause, so they replaced all of the logic boards, video cards, and screens, and got us back online asap. This resolved the problem, but we were curious to know why. After days of rigorous testing, we concluded that the issue is caused by a bug in MacOS. Specifically, faulty Kext files (Kernel Extension files extend the functionality of the MacOS Kernel) for the ATI drivers. So, why did the replacing the hardware work? We think that the Kext files that were released and distributed with Lion (and later MacOS versions) correctly supported the newer hardware revision of the replacement components, but not the older ones.
If you're experiencing this problem, short of replacing the components or waiting (for another 3+ years) for Apple to hopefully fix their OS software, you can lessen the effects and be able to recover faster by doing the following: (Please bear in mind that these are not permanent fixes.)
Turn on "Hot Corners" and assign one corner to "Put Display To Sleep". When your screen goes to sleep, move your mouse (which still works) to that assigned screen corner for a second, then move it again. This will wake your screen. You may have to do this a couple of times, but it's much faster than a hard reboot or a sleep on/off for your iMac.
Turn the brightness of your screen to a low setting (10%-15% of the total brightness).
Turn on screen sharing, so you have a last resort method of accessing the machine.
If you're not convinced that it's a MacOS software problem, then do what we did and see for yourself; install Windows 7, Windows 8, or Linux via Bootcamp or as the only OS on the iMac. Those operating systems and drivers worked flawlessly for us; the bug does not occur and the screen does not go to sleep, but if you dual boot and switch back to MacOS, the bug reappears because the iMac is loading faulty Apple MacOS software.
Good luck!

Imac 24 LCD

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