为何打开了usb调试手机也连不上电脑

可能原因包括：驱动未安装、数据线问题、手机USB调试未正确开启、电脑端权限未授予或系统设置限制。建议检查数据线是否正常，确认驱动安装，确保手机授权弹窗已允许，尝试更换接口或数据线测试连接稳定性。

可能原因有：数据线损坏，尝试换根线；电脑未安装合适驱动，需安装对应手机驱动；手机设置中选择的USB连接模式不正确，可切换模式再试。

可能原因有：数据线损坏、电脑未安装手机驱动、手机USB接口接触不良、电脑USB接口故障、手机设置里有其他限制（如安全软件阻止）等。

你只要到手机里面设置-程序-安装与调试-打开USB调试，必须找到USB调试打开然后系统自动安装驱动，安装完毕后就可以了。

如果你的手机是插在电脑前边的有可能是你电脑前边插口电压不稳的原因，如果是的话试着插在电脑后边。或者你的电脑没有你手机的驱动.....

驱动重装下看看

你好！
进入“设置”——“全部设置”界面——“关于手机”——连续快速点击“android版本”5次，即可打开“开发者选项”，进入“开发者选项”，就可找到usb调试了。
希望能帮到你，望采纳！

这是电脑中还缺少手机驱动程序所致，解决办法是：
1、必须要先打开“USB调试”；
2、分别在电脑和手机下载安装 豌 豆 荚 软件，用USB线将手机与电脑连接，电脑中的 豌 豆 荚会自动在网上搜索并安装适合你手机的驱动，在手机弹出的USB选项中选手第二项“媒体设备（MTP）”，确认与电脑连接了。安装豌 豆 荚以后，可选择Wifi连接方式，可通过wiFi实现无线连接，不需USB线。

不知道
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