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Re: Wrong SNES video

Posted: Wed Nov 23, 2022 4:35 pm
by jcarlos
I already replaced both video RAM memories and nothing continues the problem. Thank you

Re: Wrong SNES video

Posted: Wed Nov 23, 2022 4:38 pm
by jcarlos
What is more likely that the failure is in the PPU1 or the PPU2?

Re: Wrong SNES video

Posted: Wed Nov 23, 2022 5:10 pm
by jcarlos
And the working RAM of 128K, I have not replaced this, could it be the cause?

Re: Wrong SNES video

Posted: Wed Nov 23, 2022 5:19 pm
by jcarlos
Here I have the electrical diagram of the snes. It is seen that PPU1 is the one that addresses the video memories and not PPU2.

Re: Wrong SNES video

Posted: Wed Nov 23, 2022 6:16 pm
by TmEE
I have one SNES where PPU1 went bad one day all of a sudden and I have heard many other reports of bad PPUs in SNES, so it isn't unlikely that this is the problem especially since VRAM has been changed.