LCD backlight "stagelighting" & intermittent image garbling + whine

Question

2009年中 MacBook Pro 13" 一体化机

745 个问题查看全部

Far M @farm61835

声誉积分: 13

3

发帖于: 2016年1月24日

更多选项

LCD backlight "stagelighting" & intermittent image garbling + whine

Hello all - any help very much appreciated. Have some ever-present "stagelight" or "spotlight" effect at the bottom of my screen, as seen in the first picture. Also, as seen in the second, the display at time locks at fades into garbled lines.

http://i.imgur.com/b1NmM5H.jpg

http://i.imgur.com/8Ttn4xk.jpg

It works perfectly on external monitor, also the second image is intermittent, and moving the screen or applying pressure to the bezel helps resolve it.

In addition, at anything less than full brightness there's a quiet high-pitched [incredibly annoying!] "whine" that gets quieter as brightness is lowered.

Here's the relevant area on my logic board... looks ok: http://i.imgur.com/f5RRNoP.jpg

This a problem with the LCD itself or just the LVDS cable possibly? Works perfectly when connected to an external monitor.

已回答！ 显示答案我也有这个问题

这是一个好问题吗？

是否

得分 1

2条评论

Is this present on an external monitor?

由 mayer 完成的 2016年1月24日

nope works perfectly on the external monitor

由 Far M 完成的 2016年1月24日

添加一条评论

2个答案

已选择的解决方案

oldturkey03 @oldturkey03

声誉积分: 781.6千

1.1千

893

2.3千

发帖于: 2016年1月24日

更多选项

Far M, the stage lighting could be caused by issues with the LED returns. Check the resistors around your LVDS connector. Also check the LED driver. For that you will of course need the logic board schematic, the boardview files and a good multimeter. Looking at your images, it is also conceivable that you need a new display. Might be the best place to start off.

这个答案有帮助吗？

是否

得分 3

4条评论:

Thanks - yeah, I guess we sort of have to proceed by process of elimination at this point, huh... how do I find the particular code I need to get the right schematic for my logic board? Will something like this tell me what I need to know? http://www.amazon.com/Etekcity-Digital-M...

由 Far M 完成的 2016年1月26日

Yes it will and if you look on your mother board you should see a 820-XXXX number. Use that to search for the schematic

由 oldturkey03 完成的 2016年1月26日

Hey there! So finally got around to this. It's 820-2530-A. Think I've found the schematic but not a clue what to do with it!

由 Far M 完成的 2016年2月6日

Identify and check the resistors around your LVDS connector.

由 oldturkey03 完成的 2016年2月7日

添加一条评论

Thanks - yeah, I guess we sort of have to proceed by process of elimination at this point, huh... how do I find the particular code I need to get the right schematic for my logic board? Will something like this tell me what I need to know? http://www.amazon.com/Etekcity-Digital-M... — Far M
Yes it will and if you look on your mother board you should see a 820-XXXX number. Use that to search for the schematic — oldturkey03
Hey there! So finally got around to this. It's 820-2530-A. Think I've found the schematic but not a clue what to do with it! — Far M
Identify and check the resistors around your LVDS connector. — oldturkey03

Sal Fiore @salfiore 声誉积分: 1 · Answer 1 · 2019-06-20T19:55:12-07:00

Sal Fiore @salfiore

声誉积分: 1

发帖于: 2019年6月20日

更多选项

This issue has now been addressed by Apple meaning they will fix this issue under warranty and pay for shipping to get your MacBook Pro back to you all within a week. Just went to pick my laptop up from the Apple Store.

-Sal

这个答案有帮助吗？

是否

得分 0

添加一条评论

2009年中 MacBook Pro 13" 一体化机

LCD backlight "stagelighting" & intermittent image garbling + whine

2个答案

添加你的答案