Update: Finally fixed it! C31 was blackened so much that I could see the little sliver of solder shorting the connection.
Here is a little background on my issue. I recently installed a MC Cthulhu and IMP switch into my Madcatz 360 Tournament Edition Stick and I immediately ran into an issue: **My home/guide button wasn’t working **and my MC Cthulhu was using Start+Select to access the Home menu. I thought it was an issue with MC Cthulhu or IMP, so after hours of blindly screwing around, I finally decided to just rip them out and go back to just the 360 PCB. The issue remains, so I’m almost positive its an issue with the 360 PCB.
I’ve checked the voltage of the “XGUILD” point on the turbo board as well as the main board and both return 0, so it must be grounded at some point its not supposed to be. This makes a little sense to me, because at the point that I turn it on, it immediately acts like the button is always pressed and I am prompted with the Turn Off Controler/Console screen (this only happens once though on start up).
I’ve also noticed that when I connect the board to my PC, the LS and RS no longer show up in the joypad management screen, but they work just fine on my 360 so its not any issue for me, but it may be related.
I haven’t found any glaring errors, but I’m also not very sure at where I should be looking either. If anyone could list a few of the possible points of error, I’d be extremely appreciative.