SNES glitchy graphics

Hey,
I assume i'm in the right section of the forum,
I've got this SNES working with all games, the sound is ok but... the graphics are very glitchy. Sometime it's just the background, sometime it's only a character or a part of the screen, and sometime it's the whole screen...

Here is a sample of Super Street fighter :


by my end, someone told me it should be the PPU(s), and Shane gave me an helpful comment below the video (that's why I'm here also),
So if you guys have better ideas, I'm all ears !
thank you

 

http://assemblergames.com/l/threads...lems-and-burn-in-test-cart.61850/#post-885678

read this post, there's some really good info in there on what the cause would be. Shane's a good guy, done trades with him. glad he could point ya over our way!

 

hi Saru , have you tried cleaning the Cartridge and the SNES Cartridge slot ?. I use a pencil rubber for the Cart then Deoxit Red then Contact Cleaner to get the residue off then Deoxit Gold , leave them on for a bit to do their magic. Also there may be broken traces on your SNES Motherboard have a look for those.

 

Hey, thanks for your help.
s8n, yes, the slot and cartridges are OK ! (I cleaned them though, already)
I'll read and try something for this SNES.

I actually got a new SNES that is also glitchy, but only on a few sprites, particularly on characters. (e.g. : only when the character jumps)

Well, I took a look at the inside, the motherboard looked just fine :


Meanwhile, I tried to replace the C59 capacitor (I read that it could be responsible of my glitches)
But... as I wanted to unsolder the old C59, I remove the small copper plate from the motherboard
So... I tried to solder the new Capacitor to the motherbopard track itself and gave it a try : The snes started and worked as before : with some glitches on the characters only. Then I checked my solder, gently pushing the capacitor : it wasn't actually soldered at all on the track. So, The is still SNES working with my games, with glitchy sprites (mainly on characters on special moves) even with the C59 unplugged !!



So, now my question is : How can I fix a removed copper plate on the motherboard or succeed to solder the capacitor to its track ?

 

Scrape the green coating from the board and solder a jumper to the leg from the remaining trace, should be fine after that.

 

Alright, thank you for the tip
I think I get it, but to be sure (forgive me, you know I'm french ) what you call a 'jumper' is a tiny wire, right ?

Also, I'm not exactly sure on wich track I should solder it, but I guess it's the thin one going to C60 (the red dot on my pic), can you confirm ?

 

Saru, you got it! Give that a try. If graphics are still corrupted l, could be vram or worse, that link provides some good ideas on where to go depending on the graphical corruption

 

Hello everybody

(...I'm also French^^)

I also have some issues with my SNES.

At boot:
- black screen
- red LED ok
- reset button ok (pressing it makes something to the screen)
- no sound

I changed everything I could:
boot transistor --> 1.5A fuse
from C59 to C67 + C73 --> bra,d new ones (spécial SNES package bought on Ebay)

Continuity tests on everything I changed, comparing to another fully working SNES (with everything from factory, nothing replaced) --> ok (same values)

--> here are the pictures of my work --> do you guys think it's correct?
https://drive.google.com/file/d/0B0tWuZDTviqlS0VFOVExUDZyZ0U/view?usp=sharing

After all that, I'm affraid the problem comes from something more difficult to change (such as VRAM or CPU chip)

Any suggestions?
Is it possible to do some final modifications, maybe some jumps or other?

Thanks a lot, see ya!