危险
有潜在危险
如果不正确地执行这个步骤,就可能导致受伤。请保持谨慎并注意所有警告。
危险

简介

使用本指南更換故障的電源

    • 在开始之前,将您的iMac如图所示放倒在柔软的表面上。

    • 在玻璃面板顶部的两个角上放置吸盘。

    • 要使用我们的吸盘时,首先将吸盘的活动手柄扳动到与玻璃面板平行位置。 在吸盘轻轻地吸在玻璃面板上时,扳动活动手柄使其与另外一个手柄平行。

    • 如果您的吸盘无法吸住,尝试使用温和溶剂清洁玻璃面板和吸盘。

    imac 2544 2.5 core i5 i touched the motherboard to supply and it spark now it is not powering

    please tell me the directions

    thanks witting for answering .

    tahir - 回复

    Im sorry to say, If it sparked when you touched it your motherboard s now fried. You need a new one.

    Robert Wacker -

    Very easy to lift the glass out. Don't jerk too hard.

    kctipton - 回复

    Success replacing the stock ST31000528AS with a STBD3000100 (Dead 1TB to new 3TB, both Seagate). First try. Using another Mac and a quality Firewire 800 cable, I formatted it using Target Disk mode, 2 partitions (defaults, except I made the first one bigger than the second). To the second, smaller one, I copied a bootable Install OS X Mavericks partition. Tried to boot. It booted, and I installed; nary a glitch. (Running the Installer over Firewire would have been faster, but I didn't want to reboot this machine.)

    See part 2 below...

    Matthew Elvey - 回复

    (Part 2:)

    I SKIPPED steps 6, 7 AND 8! Instead, after doing Step 5, I noticed I then had enough room and cable length to access the screws in Step 11 if I lifted the LCD up an inch or so, rotated it about 20-30 degrees clockwise and moved it a couple inches toward the base, and put it down. After removing them (Step 11), I propped up the LCD (with a spare spudger) and had enough room to do Steps 12, 13, and 14 without much difficulty. Felt safer/less work and risk than not skipping steps 6-8. No risk of the damage Ersan and Michael caused performing Step 7!

    Matthew Elvey -

    I just edited that step to add a note about the shortcut.

    Matthew Elvey -

    What the ???

    Geoff Wacker has REJECTED my edit: https://www.ifixit.com/Guide/history/ste...

    I wonder why. What's the deal, Geoff? I mean I'd understand if I suggested folks didn't need the suction cups, as that could cut into iFixit's income stream, but what's wrong with suggesting that a few steps aren't needed? It worked for me; the EMC 2389 I fixed is humming along with a new 3TB HD I installed while skipping those steps.

    Matthew Elvey -

    I did not have to remove a single cable! After undoing the torx screws from the sides, I was able to rotate the LCD out of the way enough to reach all the screws holding in the ODD bracket. One of them was a bit challenging to get to, but I never felt that I was risking the cables by leaving them connected. Also, it wasn't totally clear, but you have to actually remove the ODD itself from the ODD bracket - 4 torx screws. The SDD mounts into the hard drive enclosure, then the enclosure is screwed into the bracket. Those holes (enclosure <-> Bracket) did not line up correctly for me, and I had to go with only three of them connected in the end. Seems to work fine.

    cdansmith1 - 回复

    Another comment on DATA & LCD Temp. Sensor cables: I had to remove the vertical sync, and the backlight cable, however, if you have an assistant or/can carefully rotate the screen clockwise/and then have it held up about 5" to 6" at a slight angle, you do not need to remove LCD data cable or LCD thermal cable, however - IMPORTANT: you must have a second pair of hands/or way to securely prop up the LCD. Also, don't rotate too much, since then you will pull out LCD data cable, and it renders the whole exercise moot, or can damage the cable or connector.

    MaximBorzov - 回复

    You don't need suction cups. The screen, held by magnets, can simply be pried off using a very thin blade such as a screw driver and fingers.

    Deepsurvival - 回复

    That's a bad idea. using a metal tool to pry off glass is likely to end with an expensive broken front glass.

    Suction cups are common. Find a couple and do it the safe way. I use some cheap ones that came with iPhone repair kit.

    max damage -

    Hello, I just need to replace a slightly cracked screen on my iMac. Where is it best to place the suction cups? Thanks in advance

    michelemiller0 - 回复

    No need for suction cups, I just stuck my nails (short like guys usually have) between the top part of the screen and body, and it came off easily. I've never done it before, so it seems to be very easy.

    Nikolas Lintulaakso - 回复

    Nails worked for me too

    Rob Dale - 回复

    Just completed the replacement of the optical drive with an SSD using an OWC Data Doubler kit. Attempted to remove the optical drive without disconnecting any cables but found it a bit fiddly to orient the screen for good access. I bit the bullet and disconnected them and found the process less daunting than I imagined. Reconnecting them was similarly straightforward if you're careful.

    Tip: you can skip the step for removing the optical drive thermal sensor connector from the motherboard. Still need to remove the sensor from the optical drive but you can leave that hanging and reattach it to the SSD later.

    osienna - 回复

    I have an odd question -- I want to remove the polarizer from the LCD. With some monitors this is trivial, others not so much. My question is whether it is bonded to the Liquid crystal, or whether it's loose, or cutting it with a razor blade would remove it. Obviously I'd like to know before I go to the trouble of dismantling the thing... Thanks. Paul

    Paul Kwiat - 回复

    I use Garmin GPS suction cup. Work very well

    jc3Dcx - 回复

    I’ve just successfully installed a 1TB SSD in place of my optical drive thanks to the information here- thank you to everyone who has contributed!

    3 comments- the procedure described here seems to vary between HD replacement and dual HD/optical drive replacement. This can be confusing at times.

    Expect there to be minor differences between the layout described and what you find when you open up your iMac. There are also, surprisingly, differences between the HD enclosure description, and the article provided by ifixit.

    I was able to replace the DVD/HD enclosure single-handedly without fully removing the LCD, or deconnecting any of the cables (steps 5-11). It’s a bit cramped, and fiddly, but I was not happy removing any of the cables despite watching videos, etc., since they all seemed to involve applying more force than I was comfortable with. A more detailed description of how to release them might have helped, but even here, there may be minor variations even within the 2389 model.

    Good luck!

    ivan birks - 回复

  1. 轻轻地竖直提起玻璃面板到足够高的高度来接触玻璃面板顶部下的卡扣。
    • 轻轻地竖直提起玻璃面板到足够高的高度来接触玻璃面板顶部下的卡扣。

    • 将玻璃面板拉离iMac的下部,并将面板放在一边。

    • 在重新组装时,请确保已经清理了玻璃面板内部,和LCD表面。当打开电脑时,没人希望看到屏幕里面满是 灰尘和指纹,这样你会抓狂的。

    What's the best product to clean the face of the LCD?

    Steve Speirs - 回复

    • 移除8颗将显示屏与外壳固定的8mm T10 梅花螺丝。

    • 最后两张照片是显示屏每一侧的细节照片。

    The metal near the screws is VERY magnetic. Honestly, the hardest and by far most frustrating step was trying to put these screws back in.

    seancourtney - 回复

    I ran into the same problem - easily the most frustrating part of this process. To help deal with it, I took a drinking straw, cut it to be about 2 inches long, and used it as a chute to guide the screw to the hole. Dropping the screw down the straw, it'd still stick to the side due to the magnets, but using my screwdriver, it was easy to push the screw down to where it needed to go, and the straw kept the screw from being pulled out of place by the magnets.

    josh -

    +1 for the straw tip. Worked a treat!

    osienna - 回复

    Hmm… yes, the magnets sucks - literally. But if you use a normal screwdriver or a bit, the screwdriver tip or the bit can be “loaded” by the magnets too. Just move the screwdriver (or bit) over one of the magnets and then “plug” the screw onto the screwdriver’s tip (or bit). It will be held by magnetic force. Just enough to move the screw vertically and very slowly into the whole.

    There are some special screwdriver on the market with “claws” to hold screws, but they are hard to find/to buy and expensive. I sometimes use superglue (a LITTLE) to temporary fasten the screw at the screwdrivers tip. This technique can be used with destroyed screw heads too to optimize adhesion.

    Udo - 回复

    Les vis sont inévitablement aimantées

    Gui - 回复

    • 小心地从顶部将显示屏从外壳中提起。

    • 切勿抬起太多。 仍然有许多线缆将显示屏与逻辑板相连。

    You can use one hand to hold the edge up while reaching with the other hand to disconnect cables. You may want to have a prop handy (like a small book) or an extra person to hold the edge up while you disconnect cables.

    kctipton - 回复

    Use the teardown guide for your iMac to familiarise yourself with the layout of everything before you dive in. I was able to get an idea of how much clearance there was once the display is unfixed from the frame, where the optical drive was relative to the base etc

    osienna - 回复

    The harddisk can be removed WITHOUT the next steps. The opening angle of the partially lifted LCD display gives enough room to untighten the two Torx T9 screws of the hard disk bracket, to unplug the two SATA connectors and to carefully lift out the harddisk. There is absolutely no need to dismantle the whole thing.

    All you need is a screwdriver which fits into the room. I’ve used the “Pro Tech Toolkit” from iFixit. The screwdriver with Torx T9 bit fits perfectly.

    The other “tool” you need is either someone who holds the LCD plate or the inner leftover of a kitchenroll, a scrunched paper, a small towel or similar which has to be stuffed between the logic boards and the LCD plate to keep the LCD at its lifted place (careful! don’t unplug any of the cables).

    I’ve opened and changed the harddisks of those 21,5 iMacs a dozen times with the help of the “Pro Tech Toolkit” and a kitchen roll.

    Udo - 回复

    If i want to replace the HD with a SSD, can i still skip the next steps? I think i can’t because i need to change the termal censor, but i would like an other opinion please.

    Danois -

    “Kitchen Roll” - paper towel core.

    kyoder11 -

    • 将垂直同步电缆连接器从iMac左上角附近的LED驱动板上的插座中拔出。

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    • 将显示器从外壳旋转到足以将LED背光电源电缆从LED驱动板上断开。

    • 将连接器从插槽(朝向iMac的底部边缘)拉出,同时按下锁定机构,断开LED背光电源电缆的连接。

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    • 抓住固定在显示数据电缆锁上的塑料拉片,并向上旋转。

    • 将显示数据线直接从逻辑板上的插座中拔出。

    • 请勿抬起显示器的数据线,因为其插口非常脆弱。 将电缆平行于逻辑板的表面拉动。

    I am having a difficult time reattaching the LCD cable. A better description or any tips would be useful here.

    Ben Bauermeister - 回复

    Me too — ditto that.

    Roger Buttermore -

    https://eshop.macsales.com/item/OWC/DIDI... —> abt. 5:30 into the vid. Handle up to slide in, then flip it down to lock the connector in place.

    Roger Buttermore -

    The connector needs to be carefully pushed in parallel to the board with a surprising amount of pressure and the pull tab must be folded back. Not super fragile, but not strong either.

    Isaac Vande Zande - 回复

    I really wish that the fagility of this connector was mentioned in Step 10 or 11.. When i rotated the screen on step 11.. It pulled this connector out and now I can't get it back in.. I hate computers.. HA!

    Philip Nelson - 回复

    • 断开LCD热传感器电缆连接器与逻辑板上的插座的连接。

    When putting the display down on the table, be careful not to kink the flat ribbon cable.

    frank - 回复

    The replacement hard drive I used doesn't even appear to spin up and the Time Capsule restore process doesn't show it as available. It just stays at Searching for disks and never finds it.

    JRBv3 - 回复

    I had to use Disk Utility to partition the drive and then it showed fine. Rookie mistake.

    JRBv3 -

    • 小心地将显示器拉向iMac的顶部边缘,然后将其从外壳中取出,注意可能被卡住的任何电缆。

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    • 接下來的幾個步驟將您的手靠近電源的暴露面。 為避免連接到電路板上的許多大電容器產生高壓衝擊,請勿觸摸電源表面。

    • 卸下以下四個螺釘,將電源與外殼分離

      • 一個9.3mm T10粗螺紋螺釘

      • 一個25mm T10粗螺紋螺釘

      • 兩個22mm T10細螺紋螺釘

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    • 拿著電源的右上角和左下角,將電源移出機殼,並脫離連接電源角的安裝柱。

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    • 小心地將電源從機殼中取出並旋轉它以露出電纜接頭,如圖所示;注意DC-Out和AC-In電纜仍然連接在iMac。

    • 在將電纜接頭從電源插座上拔出時,按下電纜接頭上的鎖定機構,來分開DC-Out電纜。

    • 一旦鎖定機構與插座分離,就可將DC-In連接器拉離電源。

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    • 在連接器拉離插座的同時,按下鎖定機構來解開AC-In電纜。

    • 從外殼上取下電源。

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结论

要重新組裝設備,請按相反的順序操作。

37等其他人完成本指南。

特别感谢这些译者︰

100%

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I avoided this repair for a while. My iMac would not turn on, no fans or response of any kind from pushing the power button. Reapir took me less than 30 minutes and was very straight forward.

lanekrarup - 回复

is there a fuse in the PCB where it can be replaced instead of replacing the whole power supply unit?

Victor Emmanuel Erames - 回复

Excellent guide! Also watched the video, then dove right in. 27 minutes later my iMac was up and running!

Dave - 回复

What video? I do not see any video on this page. Could you please share the link?

Thank you

vedelfino -

It took me like 20 minutes to replace the power supply. Having somebody hold the display unit while disconnecting/connecting the underneath cables was a big help ;)....and a flashlight to see better inside.

vedelfino - 回复

I did this replacement and it went great.

iMac turned on, but all the fans are blowing out of control.

I use Macs fan control now, but I would rather understand what I did wrong and how can I fix it.

Maybe I pulled the wrong wire somewhere? Although I swear I did it exactly as instructed.

Any help would be greatly appreciated.

dean baram - 回复

The imac is working fine, with a second display, the imac screen is now black, have checked all connections, not sure what I did wrong, any suggestions?

iMacker - 回复

how to verify a power supply?

erickwok1105 - 回复

Hi i want to replace my power supply of iMac 21,5” Late 2011 to a power supply of iMac 27” 2009-2011 for power increase, because of CPU Upgrade to a i7 2600.

Is it possible?

Greets

Roman Pi - 回复

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