（發問）Inspiron N4110 開機時出現嗶嗶二聲...

各位大大：
小弟的Inspiron N4110在開機時出現
下列訊息..
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The AC power adapter wattage and type cannot be determined
The battery may not charge
The system will adjust the performance to match the power available
Please connect a DELL 90W AC adapter or greater for the best system performance
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請這是AC電源出了問題？還是說電池掛了呢？
此筆電購買於100.5.26

懇請各位大大不吝教導，謝謝！