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X99 Micro 2- Burned out mosfet, no system issues, what does it go to?

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Snypr18
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2018/12/22 16:54:33 (permalink)
Hello, I have been running this system for around 3 years now with no overclock. Today, before powering the system on, I noticed the power LED on the mobo was blinking as if there were a short circuit somewhere in the system. After applying a bit of pressure on the cables plugged into the mobo to ensure they had good connections, the power LED returned to normal. I powered on the system with no issues. A short while later I smelled an electric burning smell (no performance issues, however) and shut down the system. Upon inspection I found the following mosfet seemed to have burned out. The system still boots and runs with no issues. What does this chip control, and will this cause any problems in the future?
 
Attached are images of the chip in question. I am hoping someone might be able to identify it and what it does.
 





 
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    bcavnaugh
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/22 16:55:29 (permalink)
    Best to RMA.
    I wonder what the Bottom Side looks like?
    post edited by bcavnaugh - 2018/12/22 17:00:11

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    Snypr18
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/22 17:02:26 (permalink)
    Thanks for the quick response. I understand this would qualify as a good reason to RMA, but if this wont cause any problems for me I would prefer to just continue using the board. That is why I am trying to identify the chip and what it goes to; if it isnt really going to limit my uses for the system (or will not cause further hardware failures) I am not too concerned. For example, if it is part of an audio input that I dont use.
     
    EDIT: I did not lift the board out of the PC but I did look underneath, as far as I could see the solder joints were intact and showed no signs of failure.
    post edited by Snypr18 - 2018/12/22 17:05:50
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    bcavnaugh
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/22 17:08:02 (permalink)
    At least Open a Service Ticket 
    This way it is on record before your Warranty runs out and is on Record with EVGA.

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    HeavyHemi
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/22 18:01:19 (permalink)
    Snypr18
    Thanks for the quick response. I understand this would qualify as a good reason to RMA, but if this wont cause any problems for me I would prefer to just continue using the board. That is why I am trying to identify the chip and what it goes to; if it isnt really going to limit my uses for the system (or will not cause further hardware failures) I am not too concerned. For example, if it is part of an audio input that I dont use.
     
    EDIT: I did not lift the board out of the PC but I did look underneath, as far as I could see the solder joints were intact and showed no signs of failure.



    I would not do that. Something caused that to fail and that is a lot of current. Also, I could not help but laugh at the designation screened on the board for that component.  FU2
     


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    #5
    Chopper3200
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/24 10:21:12 (permalink)
    That component is a surface mount fuse.  Something shorted out.
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    HeavyHemi
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/25 15:12:04 (permalink)
    Chopper3200
    That component is a surface mount fuse.  Something shorted out.


    Yes indeed, Polytronics  2.6 amp resettable... well used to be before the magic smoke escaped.

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    ty_ger07
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/25 17:08:28 (permalink)
    Not a MOSFET. It's a fuse. Probably for the USB Type-C port. Can you verify that the USB Type-C port no longer charges your phone or whatever you might have around to test? The data functionality of the Type-C port would likely still work, it's the charging functionality which would no longer work assuming that fuse is for that port.

    Perhaps the Type-C port IO Shield tab was improperly aligned and sticking into the top of the Type-C port.



    If everything you use the motherboard for is working properly, I don't think that I would RMA it. I have a feeling that EVGA would reject the RMA anyway and say that the damage was caused by improper use. I would guess that your motherboard warranty is now considered void.
    post edited by ty_ger07 - 2018/12/26 00:15:42

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    Snypr18
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    Re: X99 Micro 2- Burned out mosfet, no system issues, what does it go to? 2018/12/26 00:22:31 (permalink)
    After some inspection I found a small black mark on the IO panel tab you have highlighted. It must have contacted an unshielded area of the Type-C port somewhere. At this point I think its safe to say this is what happened.
     
    In true EVGA fashion they have have offered to replace the board, but they do not have any X99 boards available. Debating whether I really want to drop cash on a new cpu rather than just continue using this board. I never use the Type-C port. I suppose I will continue using it over the holiday and see if any issues arise. Thanks to all for your input.
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