Missing Capacitor on NOTEBOOK motherboard

Posted on 2007-10-04
Medium Priority
Last Modified: 2013-11-17
I was replacing a DC Jack on a laptop motherboard, and unfortunately, I knocked off a tiny capacitor right beside the DC Jack, and of course, this capacitor is right after the + Voltage pin, so obviously, it won't charge now.  I don't know enough about this to fix it.  Luckily, the capacitor is not so small that i cannot physically solder on another one, but I don't know the capacitance, so should I replace it?  IS IT POSSIBLE TO JUST RUN SOME SOLDER OVER THE SPOT ;-p, probably not is my assumption, but I HAVE to fix this somehow.  
Question by:dbestcomputers

Expert Comment

ID: 20016413
I believe your best bet would be taking it to a professional electrician/engineer and seeing if anything can be done.  From your post it seems like this is a client PC...?  If so, while you might be able to do this on your own, you'd at least have some sort of guarantee on their work.
LVL 26

Expert Comment

ID: 20016414
What is the make and model of the laptop and is it still under warranty? If it is, contact the manufacturer. If it's not, by providing identification information we may be able to point you in the direction of a service manual or offer other assistance.
LVL 31

Assisted Solution

rid earned 900 total points
ID: 20017190
Are you sure it's a capacitor? If its absence stops charging, it could well be a diode; a missing capacitor shouldn't have this effect. Not that i matters perhaps, but just so you don't jump to a conclusion and attach the wrong type of component.
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

LVL 14

Expert Comment

ID: 20017789
I had a similar problem on my wife's laptop.   The power connector solder connections kept breaking.  After the second fix failed, I gave up.  I "solved" the problem by purchasing a docking station to get power to the laptop.  Not a solution if this is a clients computer but it could allow you a few more years on a personal one.

Author Comment

ID: 20017834
Good call RID, but it is labeled C5320 on the board, so I assume it is a capacitor, because there are R and F numbers as well. Is this a capacitor? And I thought that no matter what it was, that it would stop it from powering, because the trace goes directly from the positive pin to the "capacitor", so breaking it off would result in an open circuit (?correct wording?)   I work with notebooks fairly often, replacing DC Jacks and mainboards, but I honestly don't know enough about it to know if it is fixable.  

You are correct that this is a client's PC, and I HAVE to fix it tomorrow or Saturday, so there is no way I can send it off.  

The laptop is a Gateway 7324.  I will try to re-explain the positioning of the capacitor, The DC Jack has traces coming off of it.  The traces go to 2 places.  The POSITIVE center pin trace goes directly to this "capacitor", and I can follow the trace to it's next location after that.

SO, is there ANY way I can fix this, either by running a wire directly from the POSITIVE center pin to the next location after the "capacitor", or can I fill the spot with solder, or will both of these solutions destroy it.  

My other thought would be to replace the capacitor, as it is broken off in such a way that I can still solder on another one, but I don't know the capacitance, would this be a viable option? Could I get one that is about the same size?  In previous posts I have had people tell me that the capacitance just has to be approximate, not exact.

LVL 31

Accepted Solution

rid earned 900 total points
ID: 20017979
The "C" suggests a capacitor, yes, but do keep in mind that a capacitor can't be in series with a DC current; it'll block DC. Measure the component, just to be sure (unless it's totally broken...) and try to find out what it is. It could of course be a small cap for suppressing interference in the power feed, but it could also possibly be a diode to prevent battery DC going OUT of the unit.
LVL 39

Assisted Solution

PUNKY earned 600 total points
ID: 20018152
You can solder the cap 10nF - 100nF there.

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Computer running slow? Taking forever to open a folder, documents, or any programs that you didn't have an issue with before? Here are a few steps to help speed it up. The programs mentioned below ALL have free versions, you can buy them if you w…
I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
this video summaries big data hadoop online training demo (http://onlineitguru.com/big-data-hadoop-online-training-placement.html) , and covers basics in big data hadoop .
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…

571 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question