So you need to apply the voltage to J2 and not J1. J1 is directly connected to X1, so it does make sense that you don't get any power up. Also you do not need to remove components. You could have just left them as is. It only states you can leave them out (to save on components).
Theoretically it is possible to connect both AOUT_NG and QUAD IIC. The big question is what application are you going to run on the LPC17 for this? MB CV is PIC_Core and MB CV V2 is still in progress and the new STM32F4 is highly recommended for this.
Looking at http://www.ucapps.de/midibox_cv_v2.html the DOUT option is available.
The caps need to be able to withstand the rectified voltage, no need for low esr ones. So use a 25V one: RAD 105 1.000/25 but i would personally take a 2200u one . For the non polarity ones use X7R-5 100N or Z5U-2,5 100N
I can confirm this is still a good option. I recently ordered two boards from above buyer. Connected the board without removing buffers to LPC17 and i could see the sdcard being formated in MIOS Studio.
I am running Ubuntu on my headless server. So it has no monitor/keyboard or mouse. I can just turn it on/off with the power button.
Not sure if it is needed on your organ console to migrate. But for a build distro i would prefer Ubuntu. But if you want to you can run the ISO and install to hdd.
I looked on the Embedded Artists Site there is no mention there of a Rev C. The link on the page still goes to Rev B schematic. Maybe it's worth sending them an e-mail.
I tried to download it from svn website. But that doesn't seem possible. I get the error:
Unable to open file: MIDIbox_CV_V2.jzml.r1887
But you can copy and paste it from here to a file called MIDIbox_CV_V2.jzml
Not sure what's more amazing, the musik or the flying. I assume the camera is not a life feed? At 2:21 flying past those houses seems dangerous. Also what altitude do you reach? Looking at the footage at 1:15 i would assume at least 2km.
After adding the Seq4l page i noticed there wasn't one for the Seq 4 either so i made a very basic one aswell: http://www.midibox.org/dokuwiki/doku.php?id=midibox_seq4. Maybe you can add the case to it?