if it’s in update mode… maybe the share + home button are shorted to ground in some way?
Did you try to update the firmware when you first got the fightboard?
I don’t know the key combination to update the fightboard. Did you ever hold down select+PS/Guide/Home when inserting the USB (that’s the update mode for the Universal fighting board).
Sorry, Torta, English isn’t my native languaje. What does “shorted to ground” mean?
It means a connector is active (connected) going from the button to the ground wire.
Pressing a button closes a circuit, sending a signal to the PCB that the button has been pressed, as the voltage along the connection gets grounded (drops to 0 volts).
Yes, the firmware updater sets this as first step. But I don’t know if the guy who mounted it did the update first. When it arrived, I plugged it into the PS4 and it didn’t recognised it. Then I tried on ps3 and PC, with no success and then updated. Right now, the firmware has been updated about 4 or 5 times, and never had any message confirming that I had the lastest update. It just updated and then worked (as long as it was conected).
About the “shorted to ground”… Might be. My stick was the ps3 mayflash (PC042), and I used the buttons Auto for PS button, 9 for share/select and 10 for options/start. Those buttons are connected to the old PCB, and don’t have their own microswitch. I’ll post a pic later.
Edit: Now I think about it, might not be shorted to ground. It it were, the brook firmware software wouldn’t ask me to push ps+share
Here’s the pic of the stick.
I guess you’ll be playing SFV now, but… any help?
Sorry for double post
Sorry I don’t know ? o.o It’s supposed to update and then says “update successful” and be ready to run.
It shouldn’t be stuck in update mode every time you plug it in.
If it’s not doing that then I don’t know. Maybe PM the brook guys? I can’t help.
The manual is here http://www.brookaccessory.com/library/dl_file.php?dir=download&filename=tZr74V5%2BsM67cmipuBeOYTMYfYWJ4A&o_file=PS3PS4FightingBoard-FirmwareUpdateGuide.pdf
How long are you pressing home and select?
I think you’re supposed to release before you click update.
I see some kind of dualmod here…
little troublesheet : try disconnecting those buttons on the upper PCB.
If your PCB works after that, you might need to connect VCC and GND to your upper PCB (i can’t see any wire doing that)
That’s all my feedback for now :)}
EDIT:
Assuming your upper PCB is common ground, that might be ok… haha
and the USB Pinout most of the times its VCC D- D+ GND or GND D+ D- VCC.
Here’s a closer look at the old pcb, where the Home, Select and Start buttons are.
Lately the brooks updater hasn’t asked me to push home+select while connecting the stick. As soon as 1 get a small enought screwdriver, I’ll try to disconnect the Home, select and start buttons to see if it works. If lucky, I’d could use it as a legacy stick
You have to understand that your “start/select/home button mod” is more advanced than you might think…
You NEED to wire VCC to your upper mayflash PCB, and you need to make some trial and error. a multimeter might be great for this, but i’m assuming you don’t have one 
I didn’t even made the mod. It was ordered, and I provided the mayflash.
Must say that when I updated the damn thing, played some street fighter 2 on a rom and every button worked
Who modded it?
try connecting the usb directly to the connector on the board there inside the josytick, so you’ll now if it’s the board or else the problem is in other place.
Since you have screw terminals, why don’t you just Rewire some of the sanwa buttons for home and select, and try the update that way? Just take the mayflash pcb out of the picture for testing purposes
I tried that too. Same result 
I’ll ask the modder if that could affect the warranty
…on a modded stick?
Uh seriously? He did a shit job on your stick and all youre doing is unscrewing and rearanging a few wires. If you have warranty on the mod then just return the stick to him and tell him you paid for a working mod.
…warranty
Hey. I may know shit about electronics, but I’m a lawyer, so yes: I covered my ass on that side if the modder dun goofed.
Edit: I was talking about warranty with the modder. So, I only touch anything after discussing it with him and being sure it’s ok.
Also, I’ve disconnected the Home, Select and Start buttons, and now my stick is recognised as controler at the first second on pc. Tomorrow I’ll try on my playstations.