Also had an issue with the Sonic Port VX. Something became lose after dropping it and it stopped working. Was thinking I would give repairing it a try before just throwing it in the trash. Was able to open it without damaging it too much and find the faulty part. Made some pictures during the process - maybe this can help some of you :-)
Under the sticker with the serial number there is a screw you need to remove.
Then comes the really tricky part. You need to get the bottom off from the rest of the device. I used some screwdrivers to push it gently between the gap at the bottom and try to remove it from the plastic latches that are inside the housing. I broke some of them during this process, but if you don't damage the housing you should be fine putting it together again afterwards, as some latches should still work and the screw that was first removed will hold it together again. At the end the bottom should come off and look like this:
You then have to remove 3 screws in these locations:
After this you should be able to remove the red cover of the audio ports:
Marked in the picture above are also the two silver clamps that hold the circuit board - push to the side and carefully pull and lift the circuit board up, without pulling on the cables below the board. Remove the two flat cables by first pulling up the black plastic parts of the sockets, so that the cable becomes lose and easy to slide out.
You should be have these sperate parts now:
For me that would have been enough to dismantle as the broken capacitor was on that board and could easily be replaced that way.
But if you need to reach other parts still you need to remove these 4 screws:
And then pull off the volume wheel:
This should enable you to remove the silver plastic part with the red top to get to the second circuit board with two more screws to remove:
You can then lift the circuit board to get to the parts of it's bottom (just be careful not to damage the cables that are connected to the microphone):
To put it together again - of course - just do everything in reversed order ;-)