Super Mario RPG Cart Repair

I found a Super Mario RPG pcb, but after testing it it stops booting after the cloudy blue skies intro. I have soldered in a new battery. And investigating I have found that it's missing two capacitors. I have purchased two a 22uF electrolytic and a .1uf ceramic, both the lowest voltage I can find, the ceramic one is 50V. I want know what else could go wrong even if I soldered those two parts in. Console5 told me a trace might be broken from the sram, but it doesn't look that bad. All I know is that the trace leads to the left of the C9 sign. But where does it begin on the SRAM?



If anybody wants it for a project, they can have it. I'm going to remove the battery first.

 

Hmm, traces look good to me, no idea what problem might be.
What two caps are you saying are missing?

 

C1 and C2. This is what a regular pcb should look like:

 

Probably the caps yeah. Right now your +5v from connector 58 isn't regulated. I'm even surprised you can boot the cart.

 

Cart Vcc should come from the console 5v rail so that would be regulated.

 

Installed two capacitors, the 22uF and .1uF at those points same problem. Looks like this thing is borked.

 

Time to test all the traces, I guess.

 

Not gonna do a damn thing. Somebody else's problem now.

 

I still have the thing, and I'm wondering if I can really fix it.

When i got the cart, the top right leg of the SNS chip was disconnected. When I put that leg back, the game ran, playing the song but got stuck at the blue skies. Is it this chip that's dead after being shorted out? Should I remove this chip and buy a preprogrammed chip to replace it? And where would I go about that? I only saw a page on mmmmonkey's page. Or is the problem somewhere on the other chips? Every other chip looks solid.

 

I believe pin 1 one the ROM is power. The game wouldn't run without that but wouldn't be damaged without it. You need to thoroughly clean the thing. There's stuff between the pins that could be making contact. In the case of the SRAM it looks like it might even be a bad soldering job. When you can see the PCB between all the pins like in the picture of the clean cart you posted try it again.

 

Is it me or does the trace just left of the word U2 SRAM look damage on the face side?

 

I'm not nintendo cart expert, but looking at the photo, some of the Nintendo sa1 chip lower traces looks ossided or damaged

 

I see some bridges on the left side pins around pin 126 as well as the Sram pins 11 & 12 although they seem to not connect to anything, there are some other bridges on some other pins which aren't present on the clean PCB (post #3).