Street Fighter 2 Rainbow/Black Belt Bootleg PCB - Red Screen

[soeffingodly]

Good Evening.  Noob poster looking for a bit of assistance with this Street Fighter 2 Black Belt Bootleg board.  [Moderators, if this is on the wrong board sorry and please feel free to move it!]

A little history - Got this on Ebay and I've yet to see it boot properly.  Allegedly it was tested prior to shipping.  I've tried this in my personal SF2 cabinet and all I get is a dark colored screen with bands of wavy lines.  Messed with the pots and had no luck.

So, hooked up this test rig using my Final Fight cab as the power supply and my GBS-8220 to run it direct to my monitor via VGA.  All I get is a red screen.  I tested my SF2 board as well as my SF2 Turbo board [both legit Capcom CPS-1 boards] and they run perfectly.  This bootleg, not so much.

The board overall looks to be in great shape.  And I don't see any blatant trouble items/spots on the board.

The board:




Did notice a jumper wire underneath.  But I assume this is to bypass the extra connectors that aren't cut out of the PCB like a typical JAMMA? [Again, still a relative noob with this so please be nice.  ]


Bad (Red) Faces:


I checked the power supply to make sure I was getting the proper voltage.  Both the supply side and the harness are receiving good power - A tiny bit over +5V and a tiny bit over +12V.  [well within safe range]

I've also tried using a +5V 2A power supply to run the GBS-8220 [runs like a champ] with no luck.  I was thinking that maybe the extra device was drawing more power and was just trying to eliminate it altogether.  If I run it via the arcade power supply or via the additional adapter I have it's irrelevant.  Same results.  I am using the 5 pin RGB connector that was already run from my JAMMA harness.  VGA out to my monitor.

Messed with all kinds of setting on both the monitor and the converter card.  No dice.

What I have not done yet is start testing the board.  I don't have a logic probe but I do have a pretty nice multi meter and a bunch of different test leads.  I'm hoping I am missing something regarding the wiring of these bootlegs as I have read about some nuance in that arena.  I've also read that some need more power to run properly.

I did see this sort of run once when I was picking up a monitor for my Final Fight cabinet.  The gentleman who builds/rebuilds arcade units tossed this in his SF2 cabinet and it did play but had a serious red tinge on everything.  I have never gotten it to run.  And I'm not sure what was different with his setup.  If anything.  I can't help but think it's wiring related or I am missing something that needs to be grounded.  Just using the typical SF2CE JAMMA pinout.

So I'm hoping I am just missing something stupid and someone can point me in the right direction.  Any help is appreciated.

Thanks in advance!

[soeffingodly]

Well, quick update.

I found a bit of info on these bootleg boards noting they need more juice than typical PCB's:
http://www.jammaplus.co.uk/forum/forum_posts.asp?TID=66537&title=sf2ce-bootleg-not-booting

No dice.  I picked up an AC adapter for the GBS-8200 that powers it separately outside of the switching power supply.  Works great.  Tested with legit CPS1 boards.  Both worked.  Plugged in this bootleg.  Red screen.  Even cranked up the juice to 5.1 and went as high as 5.4 as noted in the post above.  Still bad faces.

I also read that the GBS-8200 can provide a red screen with signal but when I turn off the power [since the AC adapter is powering the card] I get no signal.  So it appears to be the board.

The power is correct coming from the switching power supply.  The power is correct when testing the JAMMA harness with my multimeter.

Not sure the best way to test that the board is getting what it needs though as testing with the PCB running I'm only seeing 4V and change against the 5V leads.  But I could be testing wrong.

With 2 legit CPS1 boards working perfectly I can't help but think something on the board is toast and I can just get the 21/22/23 ROM chips and make my SF2 Turbo into Rainbow if I want.  [Assuming BB is just another name for Rainbow which I think is the case.]

Anyway, I'll update if I find anything else. Any input is appreciated.

Thanks!