본체 새로삿는데 윈도우깔려고 연결 했는데 자꾸 모니터에 빨간불만 뜨네요 .. 그래픽카드에 꼽는데가 두곳잇길레 두곳다 꽂아봐도 신호없음만 나옵니다 ...이거 도대체 어떻게 해야하나요 ...?