Snes JR repair help needed

I bought an dead snes jr from ebay and trying to rescue it!

The guy i bought it from have done an bad RGB mod and messed up the S-RGB chip.
https://imgur.com/a/bxZBJ six of the solder pads are gone.
i did the RGB amp and the console works but not mario rpg and star fox (in starfox i hear yhe sound), but yoshis island runs.
can it have something to do with these pins on the S-RGB chip? these games works in my other snes.
Thanks

 

The RGB mod you did is bypassing this IC. (Assuming you are using voltar's or VGP addon board) So those pad's missing shouldn't be the problem. I'd look at the cart slot next (Both the mechanical connector and the solder joints). Then investigate the ram if the cart slot looks fine.

 

im using this rgb mod http://retrorgb.com/snes1chipdiy7314.html and i take rgb from R6 R7 R8.

i get continuity on all pads from card slots to solder pads, maybe a trace is broken somwhere else the line?

 

When you use the THS7314 you bypass the S-RGB chip.

 

all pins? ifi wanr csync for example i must take it from the s-rgb chip?

 

i removed the S-RGB chip just to see what happens and i didnt even get a picture from yoshis island now?

 

Try and restore the s-rgb chip before anything else.


Source.
http://retrorgb.com/snescsync.html

 

That is my opinion aswell, hard to see where these goes?

 

I can try and trace it out for you as I have a snes mini.

 

Thanks! here is a better image of the S-RGB removed, you can see witch pins i need to revire.
https://imgur.com/a/YHafx

 

Have you looked into it yet?

 

https://i.imgur.com/RmCXZ3H.jpg
For clarification, I havent tested these points, but this should be right.

So, Blue out should connect to the pad i circled.
White is Not Connected, so dont worry about those 2.
The black line is GND. Just wire it to any ground point (pin 13 is gnd, so a short wire to that will be fine)/
Red out is still there, so dont worry about that.
5V is still there, so dont worry about that.
The White Line is labeled as Not Connect / ? on the pinout of the chip... regardless, that pad i circled should be fine to wire up to that pin.
Y is Luma out for S-Video, so, unless you need svideo, dont worry about it.

 

I have revired the pins as you suggested, but the problem is still there?

 

It sounds like its not the RGB chip thats the issue..

Those games not working right could be the games themselves. At least, with starfox, if the SFX chip isnt read properly, then you may still hear it but not see it. It's most likely the cart connector though. Try cleaning the carts themselves with isopropyl alcohol and a qtip and use something like a tshirt and isopropyl alcohol to clean the connector.

 

Ive already done that i have also changed the whole cartridge connector but with no luck?

 

take pictures of both sides of the mainboard. take close up pics of the cart connector pins.

 

Csync is passed through the S-RGB alone with the RGB lines.

If you are grabbing CSYNC-OUT from the out on the S-RGB IC then wouldn't get video. Grab CSYNC from the CSYNC-IN (pin 7) instead.

 

sync is not the problem

 

OK? So all games work fine without the S-RGB chip install?

 

No as i sad no games work if i remove it. Must be something else