戴尔笔记本电脑 开机后显示No bootable devices were found Possible causes could be a

1.开机按del键进入

2.将光标移动到（按上下左右键）“advancedbiosfeatures，按enter键进入页面，该页面有“firstbootdevice，选择这个，按回车进入，选择hard-disk

按f10保存即可