I'm experiencing some odd behavior upon getting my CPS2 Multi Kit to boot up and work
I've overcome many pitfalls and bugs over the last two weeks. I've gotten to a point where I can load any game I throw at it... Except one.
Only one game so far, out of about a dozen horizontal games tested is having a problem
ANY version of Eco Fighters, doesn't matter which one, loads all the way to the warning screen, it then hangs on the warning screen just a bit too long and then crashes to a solid grey screen. Just before that there is a garbled checkerboard like static laden screen, then, all grey. If I reset it, it will once again boot, first a memory check, then the title screen, then the region copyright warning ... Then crash... Very frustrating. It will not allow me to enter test mode.

Managed to capture this just after it crashed, just before it goes grey. It's very fast. There is another garbled screen just before this one. Too quick to photograph. On a few occasions the game would hang on the warning screen and go no further.
No other game does this. I've tried different micro sd cards. I even tried a couple 2GB cards with just that game on it and no go (while the same card loads any other random game if I swap it out with say "1944")
I've poured through all the troubleshooting threads and have at one point or another tried everything previously suggested. I've squashed a lot of other bugs thanks to those posts but this one persists.
The rom pack is straight from the 7Z file from mega.nz. It's the latest one, which I downloaded about two weeks ago when my kit arrived. The only thing I have not tried is redownloading that archive but I don't see how that could be a problem if everything else works and the game loads without error. I've tried writing the game to sd right from the 7Z archive, worrying that possibly the unarchival of it on to my PC desktop may have been corrupted but it doesn't matter.
Has anyone run Eco fighters from the latest full roll up pack? (Any version, they all do the same thing on my kit) I think the date on it is 9/25/16 or there abouts, it's version 2.3.
I guess if it can be verified that no one else has issues with the same pack / same game, then I have to wonder if there is a hardware issue. It seems unlikely given how many other games run flawlessly. It's hard to fathom how it could be the sd card but I've seen how finicky they behave from one to the next and my experience with many other sd flash carts certainly does not rule out the possibility, but after trying at least 6 different cards of dif sizes, I'm running out of hope that it's merely an sd issue.
My Rev 7 board is pristine. It has a G PAL already on it and all the jumpers were set as they needed to be from the factory. It's perfect. I'm suspicious of the A board. It's actually my second one after the first had a graphics issue. This USA region A board has spots of rust &/or corrosion on it although not from a burst battery. Almost as if it was exposed to moisture in the past. Originally the right channel of the audio didn't work but I fixed that bug.
Is there something about Eco Fighters that is different from other games?? I even tried other games by the same group that programmed it after reading up on it to see if there were any similar reports .. So far all other games run without issue.