RE: Dell XPS12 messed up during BIOS update
Found some similar situations with the XPS 12. While plugged in and on, bold the power button I to shut it off. Then unplug the power supply and do a “hard reset“, hold the power button in for 30 seconds and see if it boots OK. One poster thinks this is due to a defect in the latest BIOS.
XPS M1530, Win 10 CU Pro 32-bit
Inspiron E1705, Win 10 CU Pro 32-bit
Dimension 9100, Win 10 AU Pro 32 bit
Inspiron 660, Win 10 CU 64 bit
Inspiron 3668, Win 10 CU 64 bit
Asus T100 Tablet, Windows 10 CU 32 bit