Question about Toshiba Satellite A105-S4074 Notebook PC

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Burns out A/C adapters

I have a toshiba satellite a105-s4074 that is frying a/c adapters, This is the second one that it has fried in a month. The first one was the original a/c adapter and then it fried a new one I bought for it after 2 weeks. What could be causing this?

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  • susan6292 Apr 22, 2009

    Nope, I'm plugging it directly into the wall, and I use different plugs in the house. Could it be the where I plug the cord into the back of the laptop be bad? My other thought at the beginning of the was that the fan isn't working right and it's over heating so I went and blew it all out with a can of air and then I bought a cooling fan pad, but the first one burnt out about a month ago and I'm on my second cooling fan pad. I have some kind of electrical issue going on but I just don't know where to start over at this point.

    Thanks for all your help!

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The laptop really shouldnt be able to affect the ac adapter.
More than likely it is something on the AC side.
Are you plugging it into a UPS? Some of the cheaper ones dont put out a true sine wave and that can have a bad result on power bricks.

Posted on Apr 21, 2009

  • Steve Bumblis Apr 22, 2009

    Its interesting that other devices seem to be getting blown as well.
    There may be a problem with the electric in you home. Sometimes this can be caused by a nearby home or business hooking up a high current device incorrectly into the grid. This can cause out of phase voltage or voltage spikes which ac adapters are more susceptible to than other appliances in you home.
    The laptop has a max temp rating of 95 deg. If it is not actually shutting down , then the fans are probably working fine.
    Again , I think it is unlikely that the pc is killing the ac adapters.
    Of course, anything can happen , but I still think it is on the AC side.
    If it is the laptop, nothing short of a motherboard replacement would fix it.
    If it is the AC, you can get a line conditioner or voltage regulator that would at least rule out a problem from the AC side.
    Cheaper than a new motherboard too.

    Good luck.


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