Erratic fan behavior even after replacement?

Question

MacBook Pro 15" Touch Bar 2018

2018年7月发布，15英寸 MacBook Pro，型号 A1989，拥有True Tone技术的LED背光15.4英寸显示器，最高6核心的酷睿 i7 处理器。

210 个问题查看全部

Josh Alinger @alingerj

声誉积分: 11

发帖于: 2022年9月24日

更多选项

Erratic fan behavior even after replacement?

My MacBook Pro A1990 fan began erratically spinning. I reset the SMC to no avail. Fan control will intermittently sense it as spinning, or will report it at 0RPM (which is when it begins spinning faster). I replaced the R fan which was the misbehaving fan, and this behavior remains. All the temperature sensors appear to be operating normal. Hardware test shows PPF003 PPF004 which is what it showed prior to fan replacement as well.

I'm at a loss, is there another part besides the logic board that could be responsible?

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

2条评论

the ground isnt attached to anything then the aluminum taped hole shaped wire for your sensers

由 hay yew 完成的 2022年9月24日

Is that assembly not part of the fan replacement?

由 Josh Alinger 完成的 2022年9月24日

添加一条评论

1个答案

已选择的解决方案

Alisha C @flannelist

声誉积分: 33.3千

26

36

32

发帖于: 2022年9月24日

更多选项

If the behavior is the same after replacement, I would also look into your keyboard cable. As I'm sure you noted when you did the fan replacement, the fans actually connect to the keyboard's board, not the logic board. The cable which then connects this board to the logic board carries signals for both the fan and the keyboard. Apple tapes over the connector on the keyboard end, but it's possible this cable is bad, has come loose, or something to that effect.

Otherwise I would make sure the fan connector itself is sound, and the little locking latch is in place.

If not those, then it's very possible it's a logic board issues.

这个答案有帮助吗？

是否

得分 3

2条评论:

This ended up fixing the problem. There were no signs of damage to the cable, so odd to have failed, but replacement resolved the fan issue and the hardware test runs clean now.

由 Josh Alinger 完成的 2022年10月13日

@alingerj Fabulous! Thanks for keeping us posted. I always appreciate when folks let us know what actually fixed the problem so the next person with this issue has something concrete to go on.

由 Alisha C 完成的 2022年10月13日

添加一条评论

the ground isnt attached to anything then the aluminum taped hole shaped wire for your sensers — hay yew
This ended up fixing the problem. There were no signs of damage to the cable, so odd to have failed, but replacement resolved the fan issue and the hardware test runs clean now. — Josh Alinger
@alingerj Fabulous! Thanks for keeping us posted. I always appreciate when folks let us know what actually fixed the problem so the next person with this issue has something concrete to go on. — Alisha C

MacBook Pro 15" Touch Bar 2018

Erratic fan behavior even after replacement?

1个答案

添加你的答案