Dell laptops' backup, recovery and diagnostic
For Dell's laptops, power on the unit, then press F12 to bring the boot menu for Recovery and diagnostic.http://www.dell.com/support/contents/us/en/19/article/Product-Support/Self-support-Knowledgebase/software-and-downloads/dell-backup-solutions/Dell-Backup-and-Recovery ...
Laptop cannot boot.
Scenario 1: Charging LED is not on
Scenario 2: Charging LED is on, but can not power on by pressing power ...