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log 005: The fuzzies: video encoding and decoding issue
On this particular repair, I had an issue where certain parts of the screen would show diagonal bars, but of two interlaced colors from nearby…
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log 004: Mario is missing! No sprites = bad ppu1
This was a funny one- the games boot and play, but there’s no characters! You CAN still die though 😉 Swapping PPU1 was the fix…
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log 003: Faulty PPU1 yields vram errors
This was one of most curious burn-in test results I’ve seen. As soon as the first vram test completed, some of the characters switched into…
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log 002: CPUs can cause graphics issues too
Most of the time, when I see graphics issues, I just assume that it’s going to be PPU related. Take for example this unit I…
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Crash on boot – (almost) always the CPU
I’ve worked on several SNES systems that will boot the diagnostic cart to the test selection screen, but then crash as soon as any test…
