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為什么打不開投影機?

答:可能是沒有打開設備電源。在打開投影電源時,必須有信號輸入,若沒有信號輸入,則投影機會倒計時5分鐘后自動關機,而關機后投影機需要散熱大約5分鐘時間,在這段時間內不能開機。

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