跳转到主内容

苹果订单编号为MC007LL/A / 27" 2560x1440 分辨率的显示器。

79 个问题 查看全部

A1316 has trouble turning on backlight

I have an Apple A1316 27” Display (non-Thunderbolt) that is exhibiting a weird backlight issue.

When first plugged into a computer, when it receives a signal, the backlight flickers briefly but fails to stay on. Otherwise the monitor works fine (the computer thinks another monitor is attached, I can see that it is displaying using a flashlight).

I tried turning it’s brightness all the way down before connecting it. When connected, it flickered, then stayed on. So it seems that it can barely muster enough energy to turn the backlight on, but once it’s on, it’s fine. Other people have had issues with no backlight after a period of functionality, my issue seems to be kind of the opposite.

What should I start testing on this? I’m leery of the power supply, but I don’t know where I might begin.

回答此问题 我也有这个问题

这是一个好问题吗?

得分 0
4条评论

What is your system?

How does the cord look?

完成的

2011 27" iMac (Thunderbolt) connect with a fine looking wire to the external display.

I think this is almost certainly an issue with the hardware inside the monitor, as the DisplayPort cable a.) doesn't really have anything to do with the backlight and b.) seems to be sending a working image that is viewable with a flashlight (and is viewable while the backlight flickers on power on). Also seems unlikely that turning the brightness down would be able to cover for a fault in the wire.

完成的

It's not that simple!

A poor connection can disrupt the video signal so the display will appear black but the backlight its self is still on. Just think how your TV works when the station signal winks out.

Given your symptoms I wanted to remove the obvious causes.

完成的

The display is still viewable using a flashlight, so the backlight is out but the signal is good, not vice versa.

完成的

添加一条评论

2个答案

最有帮助的答案

The fault was with the aging backlight strips that were drawing too much current. After replacement the monitor works fine.

See my response What components need replacing on the Logic board?

这个答案有帮助吗?

得分 1

1条评论:

Spoke too soon - the issue has persisted after replacing the aging backlight strips with new ones.

完成的

添加一条评论

I believe that you should start with the power supply, as this would most likely be the issue. Or you should check the backlight filter in the device.

这个答案有帮助吗?

得分 0

4条评论:

I mean, intuitively it is a power supply issue... actually fixing it is a more difficult task

完成的

Yeah, it would probably all relate to the power supply.

完成的

Replaced power supply, issue persists.

完成的

After replacement of backlight strips in panel the display is fully operational.

完成的

添加一条评论

添加你的答案

Michael 将永远感激不已
浏览统计数据:

过去 24 小时: 0

过去 7 天: 0

过去 30 天: 2

总计 381