Sound Blaster SB1740 not work after sparks when attach to working computer

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3553
    • slovakia
    #1

    Sound Blaster SB1740 not work after sparks when attach to working computer

    Hello have this Sound Blaster SB1740 that not work after sparks when attach to working computer. I not found any short on pcie pins. measured coils. one have 6V, second 12V and other have 0V and short to ground. i try to inject but looks like straight short to ground. i inject 1V 10A but nothing gets hot on thermocam, only wires. when i removed coil i found 12V on power side.

    anybody knows what is that rail for?
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    • прямо
      Badcaps Veteran
      • Sep 2022
      • 261
      • Indonesia
      #2
      Part of a DC to DC converter for the opamps maybe? something like a boost with a charge pump if the opamps operate on +/-15V supply rails.

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