SNES savants - 1 chip with garbled graphics

Hi all,

Aware there are some super knowledgeable hardware types here. Just wondering what your opinion is on this ded SNES.

I bought this to use the case for a mod I'm working on but as it's a 1 chip, it seems a shame not to have a go at bringing it back.

 

It would help to have more than a single picture. Describe what it does when various software is run. Is there any sound output? Does the garbage on screen change or is it static? Is it the same with different games running? That could help narrow it down.

 

I'll give some more details asap. My daily SNES is an Analogue Super NT with jailbreak firmware so currently don't have any physical cartridges. I have Starwing on the way, should be here by the weekend.

 

It can be many things.
If there are no broken traces and the sound and controller works, more likely it's the sram or one of the ppu.

 

Well, I know how this'll turn out. Please don't throw the mainboard away, the sound chip is still working and can replace a dead one in another 1Chip.

 

So, Star Wing arrived and it won't boot on this 1 Chip or my Analogue Super NT... black screen, nothing. While I was in town, I noticed Stunt Racer in the window of Cex for £4, so I grabbed that.

Boots fine. Console appears to work perfectly....

The screenshot above was from the seller, I've never seen this behaviour from it yet. I'm going to pick up a non-fx chip game to test as well but looks like this console may be alive.

I guess that's both good news and bad news for me. I wanted to mod my Analogue Super NT into it for the ultimate OG looks, so now I need another ded SNES.

 

On a separate note. Worth trying to repair this copy of Starwing? Not even sure what to try. The contacts are clean and shiny and no signs of damage.

 

Wow, I didn't expect that!
The console is fine then. It'd be nice to know what the seller tried to produce that picture

The Starfox could be anything really. Very rarely a mask ROM just dies and the data is invalid.
It could be any of the extra chips as well.
If you have a cart dumper, try to read out the ROM.

 

Not going to celebrate too hard yet. I wonder if maybe there could be an issue with RGB output? I tested with a composite cable I had lying around from my N64.

Planning to grab a RGB scart cable and another non-fx cartridge to soak test with.

 

If Composite worked on a 1Chip, I wouldn't worry about RGB. The signals must be fine when they get encoded into Composite, and there isn't much to go wrong after the encoder.