Sound problem with AES Cart

[Luciano]

Hi,

I have a problem with my Thrash Rally homecart.

One of the sound channels doesnt work, there is only a distorted noise instead.

I cleaned it a lot and opened the cart, but no success. The neo geo logo jingle plays fine but the engine sound is totally broken.

I checked the boards but could not see anything unusual, so my suggestion is that the sound chip is broken.

Has anybody an idea on how to fix the problem? Or is there a possibility to change the sound chip?

Thank you in advance.

 

[Xian Xi]

It's one of the TTL chips.

Edit: Wait, Thrash Rally actually has a PCM so it could be the PCM, bad trace from V rom to PCM, bad v rom etc.

 

[Luciano]

Cool thanks. So what should I do to repair it? Change the chips?

 

[Xian Xi]

Is this the only cart that does it? Have you cleaned the system slots?

 

[Luciano]

Yes it is the only one and I tested it on another system as well.

 

[Luciano]

Any suggestions anybody?