简介
本指南详细介绍了如何拆卸 2019 年 iMac 4K 中的主板,以便拆卸或更换 内存。
本指南中的某些图片使用的是较旧的 iMac,在视觉上存在细微差别。这些差异不会影响维修程序。
本指南要求您处理含有大型电容器的电源。拔下 iMac 的电源插头,按住电源按钮至少 10 秒钟,以帮助电容器放电。处理电源板时要注意边缘,不要接触表面元件。
你所需要的
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在这个步骤中使用的工具:iMac Intel 21.5" Cardboard Service Wedge$4.99
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当铰链可以自由活动时,iMac 会失去平衡,难以进行维修操作。请在底座中放置一个 iMac 维修支架,以稳固 iMac。
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将新的替换部件与原始部件进行比较 - 您可能需要在安装之前转移剩余的部件或去除新部件上的背胶。
要重新组装您的设备,请按相反顺序执行上述步骤。
将您的电子垃圾送到 R2 或 e-Stewards 认证回收商。
修复没有按计划进行? 请查看我们的 论坛 获取故障排除帮助。
53等其他人完成本指南。
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23指南评论
I attempted this upgrade myself because iFixit labeled this as Moderate difficulty. The entire process took me seven hours from start to finish, and when I was done my computer would not turn on. I tried to do this repair myself because my local computer company wanted $400 to do this upgrade using Apple RAM, and I couldn’t afford that at the time. I had to take the iMac in to be serviced when it wouldn’t turn on, and the computer company just quoted me a price of $600 for a new logic board if it was damaged during the upgrade.
I am posting this to warn anyone else who is considering doing this upgrade to hire a certified technician. Do not go by iFixit’s difficulty rating. If you do, you may risk even greater expense if something goes wrong, like it did with my own attempt.
Perhaps iFixit should consider changing the rating on this task to Extremely Difficult, or Advanced, or LOL DON’T EVEN TRY IT to warn any other unsuspecting customers who are looking to save a little money.
It is very likely you just missed plugging in the cable from the power button to the power supply. Very easy to do and very easy for the very small cable to slip behind the power supply and you never notice.
Always a good idea to check each step as you go and read the whole guide from start to finish before you start and also in the process of reassembly.
I did this in about 3-4 hours over a Saturday afternoon. I had previously done hard rive upgrades in a 2009 iMac and a 2012 MBP. I was encouraged by a tech friend and pored over the guide for a few times to get my courage up and then discussed the step by step with him first on a zoom call. The courage is required to remove the screen. After that the guide is very solid and clear and the steps are easy to comprehend though removing the power supply is a bit tricky and the microphone cable can be elusive. The only mistake I made is when reapplying the screen, having already checked function, I got into a sweat and banged to sick it on with the VDU cables not properly connected. I would recommend have some help for the screen re application and talk it through so you avoid that kind of schoolboy error. Having removed the screen and re-applied it I am very happy. A great guide.
Jon H Smith
Sehr gute Beschreibung, jedoch stellt sich mir eine Frage nach dem Wieder zusammen setzen benötige ich doch einen Vergleichsweisen Kleber der meinen Bildschirm auf den Rahmen setzt. Damit er nicht herunter fällt. Gibt es da welche zu kaufen oder hält das wieder von alleine?
Ich habe einen IMAC 4k 21´Zoll 2019 und möchte gerne Arbeitsspeicher und CPU tauschen.
id did it in 3,5 hours, no problems at all, everything works as described.