Blazing Star MVS problem - crash on intro loop

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ShutokouBattle
Posts: 138
Joined: Sat Sep 18, 2010 10:53 am

Blazing Star MVS problem - crash on intro loop

Post by ShutokouBattle »

Although this is technically about the game, I'm posting this in the hardware forum because it has to do with the hardware of the cart itself. I have this Blazing Star cart for MVS - I got it in 2006. When I first got it, the intro loop would play normally, no issues. At some point, the intro would no longer play, and instead the game would start to run and the graphics would briefly become corrupted and then the system would crash and reboot. This can be bypassed by pressing start when the game boots, and then the entire rest of the game runs normally. The intro won't play, though. Someone once suggested that this could be due to a problem with a "fuse" inside the cart, however I've just taken a look inside and I think I know what the issue is, but I wanted some feedback.

Image

As shown in the picture, in the area labeled "PC4" (a tiny space, about 1.5mm long) there appears to be something missing. This is sitting next to a ROM chip, and looking at the other ROM chips in the cart, every ROM chip has a component here labeled "PC[something]", and they all look like capacitors - for example, you can see PC3 next to the other ROM chip in the picture. Also, looking at scans of the board, it turns out there indeed should be a component in PC4; I don't quite understand how this one came out. So, my idea is that the ROM chip next to PC4 must be what stores the intro.

Here's a picture of just the chip:

Image

The lack of a capacitor in PC4 must cause the intro to crash. That makes sense, considering the rest of the cart appears intact, and accordingly the rest of the game runs fine. What I'm a little confused about is how and why is this component missing in the first place? Like I said, when I first got the game the intro would run normally. Is it possible that the cap was already loose, and at some point it just fell out or something? Sounds a little far-fetched. I guess it's also possible that the lack of a capacitor damaged the chip gradually over time, and that's why it no longer works properly. What do you think of the idea that this chip, labeled "239-P1 9753 D", is responsible for the intro, and this is why the intro isn't working? It seems plausible to me, but I'd like to get your input. The thought occurred to me that it might be possible to figure out what's on the chip by messing around with it in an emulator.

Another question: does anyone know exactly what kind of capacitor should be in PC4? I'm guessing it's the same as all the others.

I know someone who might be willing to repair the cart for me; I can't do it myself. I can solder, but I doubt I'd be able to solder something that small. In the event that my friend isn't able to repair it, I may be looking for someone else to do it.

I had another unrelated question about this game. When I bought the game years ago (in 2006) the seller told me that the boards are original but the label is fake. So, I always assumed that the label was fake. However, I was reading about fake labels, and one thing I read is that for games with holo labels, the way you can tell if it's fake or not is that only real labels have a ribbon-like holo pattern (kind of like DNA) and fake labels have some other kind of pattern. Well, looking at the label, it is indeed a ribbon pattern. Take a look:

Image

It's hard to take photos that clearly show the holographic part, but you can kind of see it. Do you think this label is original? It seems possible that newer fake labels might be able to replicate the ribbon pattern, but I've had this cart for a long time. It seems unlikely that people back in 2006 would have been able to fake that. The seller might've been mistaken in thinking it was fake. What do you think?
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ChuChu Flamingo
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Location: United States

Re: Blazing Star MVS problem - crash on intro loop

Post by ChuChu Flamingo »

I don't think the label is fake. Some games came with paper labels and others with glossy holo labels.

https://www.mvs-scans.com/index.php/Blazing_Star


Judging by the pictures on mvs scans and the ones you provided there definitely was something there.


I know this sounds dumb but have you tried cleaning the cartridge with a soft white eraser all four sides + finishing up with electrical contact cleaner? You should also clean your cartridge connector. I assume you don't have a unibios installed on your neo geo. It would give some pointers on what the error code is with its exceptions.

But yeah if you need someone to fix it or ask questions James from Jamma Nation shoulld be able to help. He would definitely know what capacitor value is used there

http://www.jamma-nation-x.com/jammax/contact.html
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ShutokouBattle
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Joined: Sat Sep 18, 2010 10:53 am

Re: Blazing Star MVS problem - crash on intro loop

Post by ShutokouBattle »

Thanks for the reply. I didn’t think the label is fake; maybe the seller was confused and mistakenly thought that it having a holo label specifically means it was a fake.

I haven’t cleaned the board, and I can’t remember if I’ve cleaned the connector; like I said, I’ve had this cart for a long time. I think the fact that the board looks kind of messy has something to do with the manufacturing process; scans of the boards I’ve seen look similarly messy. It’s a pretty awesome game, by the way. I may end up contacting that person at Jamma Nation.

Also, I don’t have a unibios. I believe it’s the standard US bios.
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