Super Famicom graphical issue

[Michiel]

I can not find a solution to this problem online.
Colors seem off.
In Desert Strike the helicopter is pink, even in-game together with other moving targets.
It seems that everything that is somewhat stationary works good but other things do not.
During the intro of Dixie Kong's Double Trouble all seems fine until the level select map starts or in gameplay.
FIFA uses a scrolling background and this is also distorted.

https://ibb.co/Bsg2QtG
https://ibb.co/DfkQV5w
https://ibb.co/DfkQV5w
https://ibb.co/16Sj7Rv
https://ibb.co/FB2wxwf
https://ibb.co/mRMT9yf
https://ibb.co/4KP5qD2
https://ibb.co/ZXpt1Yd
https://ibb.co/fQJy5bV

It's a Japanese Super Famicom, powered by a Sega Megadrive 1 PSU.
TV out is through a HDMI converter for SNES/SFC/NGC/N64.
Just to be sure I ordered a recap set and a TV to composite out for NTSC systems.
Friday I'll receive a PAL SNES to test the HDMI converter.


Any clues?

[Ziggy]

My first suspicion would be the HDMI converter if that's the only thing you've ever used the console with. Definitely try composite cables and see if you still have the same problem, although you will need to make sure the TV or monitor can accept an NTSC composite image. Since you call it a Mega Drive, are we to assume you're in a location that uses the PAL standard? Exactly which HDMI converter are you using? Does it have a switch for NTSC/PAL modes?

[Michiel]

My first suspicion would be the HDMI converter if that's the only thing you've ever used the console with. Definitely try composite cables and see if you still have the same problem, although you will need to make sure the TV or monitor can accept an NTSC composite image. Since you call it a Mega Drive, are we to assume you're in a location that uses the PAL standard? Exactly which HDMI converter are you using? Does it have a switch for NTSC/PAL modes?

Yes, I live in Europe hence the PAL region.
I've tested the PAL SNES and this one has no problem with the HDMI converter, image is clean and normal.
The converter is a cheap one from AliExpress and has an automatic switch for PAL and NTSC.

[Ziggy]

Do you have any other NTSC sources to test that functionality with the HDMI converter?

[Michiel]

For the moment not. I will check to see if someone can borrow me a NTSC SFC or SNES.

[nightrnr]

I had a Super Nintendo die on me years ago.
It started with graphical glitching and off colors.

viewtopic.php?f=17&t=46426&p=879533&hilit=Snes+nightrnr#p879533

I concluded that it was one of the ppu chips going out. Eventually it stopped loading games altogether a pity as I was going to use it as a dedicated SGB player).
I still wonder if there is something that could've fixed it, but I went the quantity route and have backup systems now.

I do hope you find a fix though.

[Michiel]

I've tested another Super Famicom and that one works perfect.
Probably it will be the PPU...

I still will clean the board thoroughly and change the caps.

Thanks for all the info.

I'll keep this post updated in case that someone searches for the same issue.