Savage Reign home cart problems

GohanX

Horrible Goose
20 Year Member
Joined
Sep 28, 2001
Posts
12,061
I've had this Savage Reign homecart for a while now that has lines in the screen but I've been too chicken to pop it open to try to troubleshoot. I finally got the proper tools and opened it (pretty easy as it turns out) to try to fix it. Everything is legit and it looks good. There were a few suspect solder joints and the connector was a little dirty so I thoroughly cleaned the connectors with Deoxit and I reflowed every through hole joint on the CHA board hoping it was just a cold solder joint somewhere. The game seems to play fine and there are no sound issues so I didn't mess with the PROG board at all. There is no corrosion on the PCBs at all and other than not working the cart is in great shape. I'm good with soldering and such but I don't know enough about how these carts actually work to go further in troubleshooting. Does anyone have any ideas on how to fix it?

IMG_0869.jpgIMG_0870.jpgIMG_0866.jpgIMG_0867.jpgIMG_0868.jpg
 

ballzdeepx

Genyosai's Servant
15 Year Member
Joined
Sep 20, 2004
Posts
2,994
I had this with an AOF cart and it ended up being an adjustment to a pot inside the aes, I want to say it adjusted the crystal timing but can’t remember. I also had a SS2 cart that had this as well and never could fix it.
 

GohanX

Horrible Goose
20 Year Member
Joined
Sep 28, 2001
Posts
12,061
I looked up my motherboard revision 3-6 and it looks like the only pot it has is TC1, which is a chroma adjustment for the video encoder. I don't have another home system to test the cart on, but it was given to me by another member as broken so it is more than just my system.
 

Misos

Super Sidekicks
Joined
Aug 17, 2018
Posts
54
The Neo Geo Logo on the intro is stored in C1 so it's probably the culprit.
I had a similar problem with a Samurai Shodown 2.
 

BIG BEAR

SHOCKbox Developer,
20 Year Member
Joined
Dec 14, 2001
Posts
7,922
Yeah,there is a problem on the CHA board.Hopefully it's not a bad rom..but if it is,you will have to replace with another original from an MVS cart or use an eprom.
BB
 

GohanX

Horrible Goose
20 Year Member
Joined
Sep 28, 2001
Posts
12,061
I can't get my ancient crappy eprom burner to work with a current computer, so I'm getting Fox1 to send me a C1 eprom, let's see if that works. Thanks!
 

GohanX

Horrible Goose
20 Year Member
Joined
Sep 28, 2001
Posts
12,061
Finally figured it out. I reflowed the rom chips before but I didn't touch the surface mount chips. I reflowed them both and now the cart works perfectly. The Neo-CMZ2 chip has some lines that run directly to C1, I suspect it was one of those pins.
 
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