可能原因包括：驅動未安裝、數據線問題、手機USB調試未正確開啟、電腦端權限未授予或系統設置限制。建議檢查數據線是否正常，確認驅動安裝，確保手機授權彈窗已允許，嘗試更換接口或數據線測試連接穩定性。

可能原因有：數據線損壞，嘗試換根線；電腦未安裝合適驅動，需安裝對應手機驅動；手機設置中選擇的USB連接模式不正確，可切換模式再試。

可能原因有：數據線損壞、電腦未安裝手機驅動、手機USB接口接觸不良、電腦USB接口故障、手機設置里有其他限制（如安全軟件阻止）等。

你只要到手機里面設置-程序-安裝與調試-打開USB調試，必須找到USB調試打開然后系統自動安裝驅動，安裝完畢后就可以了。

如果你的手機是插在電腦前邊的有可能是你電腦前邊插口電壓不穩的原因，如果是的話試著插在電腦后邊。或者你的電腦沒有你手機的驅動.....

驅動重裝下看看

你好！
進入“設置”——“全部設置”界面——“關于手機”——連續快速點擊“android版本”5次，即可打開“開發者選項”，進入“開發者選項”，就可找到usb調試了。
希望能幫到你，望采納！

這是電腦中還缺少手機驅動程序所致，解決辦法是：
1、必須要先打開“USB調試”；
2、分別在電腦和手機下載安裝 豌 豆 莢 軟件，用USB線將手機與電腦連接，電腦中的 豌 豆 莢會自動在網上搜索并安裝適合你手機的驅動，在手機彈出的USB選項中選手第二項“媒體設備（MTP）”，確認與電腦連接了。安裝豌 豆 莢以后，可選擇Wifi連接方式，可通過wiFi實現無線連接，不需USB線。

不知道
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