this post was submitted on 27 May 2024
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Can I fix a missing capacitor by just soldering the spot short? (lemmy.blahaj.zone)
submitted 5 months ago by fnafdesktopfan111@lemmy.blahaj.zone to c/askelectronics@discuss.tchncs.de
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So, I've got a laptop screen that's giving up on me. 2/3 of the screen runs alright but the 1/3 on the left edge is acting weird. Half of the broken section displays an image but the image smudged and weird, while the other half is just dead. I opened it up to see what's up and, lo and behold, a wee tiny capacitor is missing (I know it's a capacitor 'cause I looked of the board marking, C248).

Now I'm wondering, since ordering a single capacitor just for fixing this screen is not worth the effort, can I just... put some solder in there to at least get power to where it needs to go? I know it's definitely not ideal but, this is an ancient laptop. Putting in the effort to fix it perfectly is not exactly a great value proposition. What I want to know most is, will the screen be damaged if I do this, or what could go wrong if I do this?

I'm pretty new to DIY electronics fixing so sorry if this is a stupid question. Thanks in advance y'all. Cheers!

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[–] jet@hackertalks.com 8 points 5 months ago* (last edited 5 months ago)

It's worthwhile to solder a replacement capacitor

Capacitors don't allow infinite current through, but shorts do... At least until the trace burns up

https://www.youtube.com/watch?v=rbCXKhhzBN0