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Old 05-05-2007, 06:46 PM   #1 (permalink)
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Default Board works when slightly bent

Dell Inspiron 4150 laptop motherboard-

I've had quite a bit of trouble with this baord, but it works intermittently, and i'm determined to fix the **** thing. I found 2 blown components on the motherboard, so i bought another bad dell inspiron 4150 board, and moved the componets over and resoldered them. Now, it once again works intermittently. However, I found that if i bend the board, it will work every time, and if i leave it flat, it's intermittent. I've had this problem before and finally found it was a few cracked solder joints, but i'm not sure if it could be the same thing here. What should I look for?


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Old 05-05-2007, 07:22 PM   #2 (permalink)
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Default Re: Board works when slightly bent

is the solder points shiny or dull? did you use flux?


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Old 05-05-2007, 07:49 PM   #3 (permalink)
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Default Re: Board works when slightly bent

Sounds like when you bend the board you put pressure on the joints, giving them a better connection.

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Old 05-06-2007, 01:11 AM   #4 (permalink)
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Default Re: Board works when slightly bent

Yeah, that's what it sounds like to me, too. But how do i go about finding a bad solder connection? Is going over it with a magnifying glass really the only way?

I do have a multimeter...
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Old 05-07-2007, 01:20 PM   #5 (permalink)
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Default Re: Board works when slightly bent

Maybe you can contact the mfg and ship it to get it functional tested. That'll cost ya though. For something as complicated as a motherboard it'd take some luck to just find the problem. I work with less complicated boards everyday that leave me scratching my head. Unless it's something big like an electrolytic capacitor, my advice is use that old mobo as a new coaster.
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