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sansuig 4500 fm radio , the stereo led don´t work this works sometimes like a flash

Hello everybody, got a sansuig 4500 change all capacitors, and the ic 1196ha, the tantalum cap too, and the fm radio sounds l very very good, but the red light of stereo don´t work can anybody give me a idea or procedure to fix the trouble?
thnxs from now