짜장면 먹으러 간다고 피씨를 끄고 30분만에 먹고왔더니 리부팅때도 멀정하던 모니터가 깜깜하네요 모니터내 표시등? 정상일땐 노랗게뜨는거 3초정도마다 아주짧게 메롱하듯 깜빡이고 비디오케이블을 빼면 깜~~빡거리며 2초에 한번쯤 깜빡이고  이거 왜이러나요?