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Hi there,
I blew my laptop's backlight fuse.
I saw some videos online that explain how to replace it, removing it with a soldering iron, and soldering a new one back on. However, these videos don't mention what are the risks and what one should be careful of when doing that.
What are the risks ? What should one pay special attention to ?
Thanks in advance for your help
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Unplug the battery whilst doing this. When removed, check both pads for a short to ground, and make sure there is nothing on the board which could cause this (damaged LCD cable, burnt pins on LCD connector, liquid, etc). Not a lot that can go wrong to be honest.
Replacing the fuse is possible with a solder iron, but it does take longer and is more fiddly. If you have access to a hot air station, this is a lot easier.
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Thanks a lot. So how do you test for a short to ground ? You mean between each of the fuse pads and the ground ?
Yes that's correct. Once the fuse is removed, check both solder pads. If there is no short, new fuse won't blow
@reecee thanks a lot. So how do I test for that short ? I just put each multimeter pins on one pad ?
With no power running through the board, one probe on ground and another on a pad in continuity mode. Then do the same to check the other pad. It will beep if there is a short to ground.
@reecee thanks ! I have tried doing that, but I don't know where I can find the ground : https://apple.stackexchange.com/question...
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This video will give you an idea of the technique you should use to properly replace the fuse using hot air station.
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@oldturkey03 Look at this! How'd he do that?
@triosimple How'd you do that? Post a video?
Are you asking how I made the video?
@mayer looks like we can now use embeded videos on Answers. Perfect! No more 10sec clips only:))
@triosimple thanks ! I forgot to precise in my question that all I have is a regular soldering iron. Any idea given this constraint ?
Over the counter irons can be more challenging but not impossible. I would purchase 5-6 fuses from mouser.com and try it till you get it right.
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2 Comments
before i replace the fuse i have to find the short right? my fuse just blows if i turn my macbook on, so do i replace it and check for the short or can i check voltage and shorts without it?
If my lvds connector or the cable is shorted, should i be possible to find the short with a multimeter in diod mode?
i got a shematic
by milo stano
@mmmilo I would be very interested to hear how to test for this. I posted a question on apple.stackexchange.com here : http://apple.stackexchange.com/questions...
by John Dupont