Screen flickering, white and blue lines

Question

iPhone 6

这款4.7英寸iPhone于2014年9月19日发布，是iPhone 6 Plus的缩小版。

4994 个问题查看全部

Hernando Berg @hernandoberg

声誉积分: 113

T&T PARTS

4

发帖于: 2018年8月23日

更多选项

Screen flickering, white and blue lines

Hello, I got a iPhone 6 in these days that had screen flickering and touch faliure sometimes and had white or blue lines over the screen. So obviously I replaced the screen first and turned it on and it still had some white lines over the screen. And the logic board got verry hot where touch ic's are located. I figured it would be a bad Mason so I replaced 2 times already with new ic and also reballed cumulus and still the exactly same problems. Not sure exactly which part is getting so hot, but that place gets too hot to touch just like before. Sometimes when I turn it on, the touch works and other times the screen gets white and blue lines all over and touch is not responding. Any ideas what to look for next?

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 0

添加一条评论

1个答案

已选择的解决方案

Minho @refectio

声誉积分: 221.4千

15

289

807

发帖于: 2018年8月23日

更多选项

I would check the power rails feeding the Touch IC’s to see if everything measures okay. Also look for bridged components that could be causing a partial short, hence excess current.

I would check the coil directly above Meson, L2401. It has a tendency to crack or have a bad solder connection as it is on the fault line as well. Whenever I replace a Meson, I always reflow it to be certain. If it is cracked, I would replace it.

Try applying some freeze spray (locally) to see what melts first, that may give you some guidance.

这个答案有帮助吗？

是否

得分 2

2条评论:

thank you for the reply. I replaced the coil and now it seemed like it worked fine so i handed it back to the customer. And guess what, now the flashlight doesn't work anymore. Anyway, he left the flashlight switched on even though it didn't work and after a few days, the screen flicking happened once again and while the screen flickered, the flashlight worked. Once the flickering was gone, flashlight doesn't work anymore. I'm quite stuck on where to look next.

由 Hernando Berg 完成的 2018年9月27日

On the reverse side of L2401, you will find the LCD connector and close by the chestnut and strobe driver IC. it's possible you applied too much heat and caused some issues elsewhere.

由 Minho 完成的 2018年9月27日

添加一条评论

thank you for the reply. I replaced the coil and now it seemed like it worked fine so i handed it back to the customer. And guess what, now the flashlight doesn't work anymore. Anyway, he left the flashlight switched on even though it didn't work and after a few days, the screen flicking happened once again and while the screen flickered, the flashlight worked. Once the flickering was gone, flashlight doesn't work anymore. I'm quite stuck on where to look next. — Hernando Berg
On the reverse side of L2401, you will find the LCD connector and close by the chestnut and strobe driver IC. it's possible you applied too much heat and caused some issues elsewhere. — Minho

iPhone 6

Screen flickering, white and blue lines

1个答案

添加你的答案