bios_upgrade.md

How to upgrade the Firmware (BIOS) of the Dell XPS 15 9550 and 9560

Step by step tutorial

Step 1: Place Firmware File

Place the EXE file in the root path of your hidden EFI partition (diskutil mount EFI in console)

Step 2: Goto Boot Menu

Press F12 while visible DELL Logo on reboot

Step 3: Select File

Step 4: start upgrade

make sure your computer has enough battery power and is connected to the power supply, otherwise flash will not start

Step 5: wait till automatic reboot

In case something went wrong:

Create USB Recovery Stick

Format USB stick as FAT32, place Firmware Update EXE file on the root of the stick and name it BIOS_IMG.rcv

Goto Recovery Boot

ensure that the laptop's battery is charged up to at least 10%. Verify that the laptop is powered OFF and disconnect the AC adapter.

Insert USB Stick,press and hold the CTRL key + ESC key on the keyboard, then plug in the AC adapter to the laptop.

Release the CTRL key + ESC key on the keyboard once you see the BIOS recovery screen.
On the BIOS Recovery screen, select Reset NVRAM(if available) and press the Enter key. Select Disabled and press the Enter key if you wish to save the current BIOS settings.

Select Recover BIOS and press the Enter key to start the recovery process.