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console defect, chipset video defect impossible to repair

helloI have a problem with some snes games, see the photo, but the games I dKC3 sound but no picture

Where is the problem is games or console ?
http://dl.free.fr/gkDwLZa5C
http://dl.free.fr/lFGclEFqe

F-ZERO NO PROBLEM
ROAD RUNNER NO PROBLEM
SUPER ADVENTURE ISLAND NO PROBLEM
KILLER INSTINCT NO ...