Display backlight not working

Question

iMac Intel 21.5" EMC 2805

Model A1418 / Mid 2014 / 1.4, 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

50 个问题查看全部

Khôi Trần @khoitran68528

声誉积分: 1

1

发帖于: 2023年2月23日

更多选项

Display backlight not working

I dissembled my device to replace a HDD with a new SSD. When I put everything back, all the components worked flawlessly. However, when it go to sleep mode, the backlight not turn back on, I still can see the content on display if I shine the flashlight on it. Every time I want to get backlight back on, I had to unplug the device and leave it there for a while, then plug it back and turn on.

回答此问题我也有这个问题

这是一个好问题吗？

是否

得分 0

3条评论:

@hellomacos - You might be able to help this person!

由 Ben Capehart 完成的 2023年2月23日

@beanman56

Thanks for tagging me in:-)

由 HelloMacOS 完成的 2023年2月23日

Hi

It might be worth disassembling the device again and examining the board for anything that looks blown(burned discoloured)

I would also try a SMC Reset

https://support.apple.com/en-gb/HT201295

Thanks:-)

由 HelloMacOS 完成的 2023年2月23日

添加一条评论

1个答案

Hi

It might be worth disassembling the device again and examining the board for anything that looks blown(burned discoloured)

I would also try a SMC Reset

https://support.apple.com/en-gb/HT201295

Thanks:-) — HelloMacOS

Jelly Bean man @jellybeanman 声誉积分: 650 8 · Answer 1 · 2023-02-24T08:52:03-07:00

Based on the information provided, it is possible that the issue may be caused by a malfunctioning backlight circuit or a loose connection between the display and backlight components.

To fix this issue, you could try the following steps:

Check the connections between the display and backlight components to make sure they are properly seated and not loose.
Update the display and graphics drivers on your device.
Check the power settings and ensure that the display is set to turn on after waking from sleep mode.
Reset the device's PRAM (Parameter Random Access Memory) and NVRAM (Non-Volatile Random Access Memory).
If the issue persists, it may be necessary to replace the backlight or other components.

It is important to note that opening and attempting to repair electronic devices can be dangerous and may void any warranties. If you are unsure about any of the steps or do not have the necessary technical skills, it may be best to seek professional help from an authorized repair service or contact the manufacturer for assistance.

I checked them carefully and several times. All the sockets are good, no exploded components on the mainboard. I have one big concern about the PRAM battery, does a weak CMOS battery cause this issue? — Khôi Trần

iMac Intel 21.5" EMC 2805

Display backlight not working

1个答案

添加你的答案