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Its to do with the scart cable!! Nintendo designed the RGB outputs of PAL vs NTSC consoles to be slightly different. There is a DC offset in the voltage levels for NTSC consoles, e.g. the signal might vary between 0V and 1V, whereas on a PAL console it varies between -0.5V and +0.5V.
SCART leads designed for use with NTSC consoles have capacitors in the R, G and B lines to remove the DC offset. Having those capacitors present when used with a PAL SNES results in the whole picture being removed.
(The Nintendo-branded RGB SCART cables that you can buy for the GameCube probably have the capacitors too, if the GC uses the same RGB levels as a US SNES.)
Open up the SCART connector shell of your SCART lead. You'll probably see three small cylindrical components in the R, G and B wires. Try removing them (i.e. connect the wires directly to the pin of the SCART connector, not through the capacitor). You should get a picture then, but perhaps not a perfect-quality one.
YOU CAN GET OFFICIAL NINTENDO-BRAND SCART LEADS FOR THE PAL SNES. But they are hard to find, i think they came bundled with the SNES in France!! |