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New Motherboard Sparks then works fine


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#1 call.me.FRUTA

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Posted 10 August 2012 - 10:24 AM

I just installed a new motherboard in an old Acer Aspire. Specifically, this one. I put it straight into the case and wired everything up - when I turned it on for the first time, I heard two somewhat loud popping sounds and saw smoke curling out above the IDE connections. It smelled awful. I pulled the power chord. After looking at the board, connections, battery, and power supply I couldn't find anything out of the ordinary. Both the PSU and the MOBO are working now and test fine. What could possibly be wrong? Does anyone know what caused the spark?

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#2 coxchris

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Posted 10 August 2012 - 10:55 AM

check the capacitor's to make sure you didn't pop one. If you see on starting to pop for example: http://www.fixyourdlp.com/forum/download/file.php?id=115. the capacitors is damage. you can replace it or send it back

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#3 ranchhand_

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Posted 10 August 2012 - 04:14 PM

Do yourself a favor and take that mobo back to the retailer for an exchange; no mobo should, under any circumstance, have that happen. What you smelled was either burnt electrolyte from bad capacitors or melted insulation. Judging from the popping sound you describe, it is a couple of capacitors that failed. Most likely they were installed with reversed polarity (by accident) at the factory. Trust me, two days after the warranty expires it suddenly will fail on you and probably you will have problems installing/booting your operating system. I guarantee that whatever happened, even if you can't visually see anything, has damaged that board. Trust me, been down that road with many clients. In the last few years these manufacturers have purchased a huge number of cheap caps from asia, and I get boards with failed caps in all the time. There are so many I taught myself how to re-solder caps onto the mobo. Samsung has a class action lawsuit brewing because so many of their TVs have failed all over the world. I replaced two caps myself on my 40" Sammy.

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#4 rotor123

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Posted 10 August 2012 - 04:59 PM

I have to agree, send it back. It may appear to be working OK. However it will fail prematurely or some of the built-in functions will have funny problems.

Was it new, used or NOS (New Old Stock)? Capacitors for example can go bad just from sitting too long with no power applied.

It scared the heck out of me when a capacitor blew on a video card on a computer I had the side off of. There was loud pop, a puff of nasty smelling smoke and a bang from the outer casing of the capacitor hitting the bottom of the case.

Been there, done that.
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#5 coxchris

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Posted 10 August 2012 - 06:42 PM

soldering will void the warranty. if it has a warranty. True story: ASUS wanted me to buy a BIOS chip so I can solder it on. I said no I want you to fix it. So I send it back A few weeks I received it I stuck in my chip and it wouldn't boot. So Amazon took it back and I call ASUS TS and documented the fault and yell at them. Let just say I got hang up on. I was in a bad mood with them so they lost me. It was a good motherboard 149.99. I got screwed 1 out of 3 billion motherboard owners

I have been there done that almost. Had one reversed polarity and It flew and created a hole in the ceiling in our lab. That was the most fun class that i took Elect 44

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