HP EliteBook 8470p

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PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS

HP EliteBook 8470p
Specifications
Manufacturer HP
Name EliteBook 8470p
Variants EliteBook 8470p
Released 2012
Chipset Intel QM77
CPU Intel Ivy Bridge
Graphics Intel HD Graphics 4000(supported in Libreboot) or
AMD Radeon HD 7570M(unsupported in Libreboot)
Display 14" 1366x768 or 1600x900 TFT
Memory Two slots, max 8GB/slot (2x1GB), DDR3/sodimm
Architecture x86_64
EC SMSC KBC1126, proprietary (in main boot flash)
Original boot firmware HP UEFI firmware
Intel ME/AMD PSP Present. Can be disabled with me_cleaner.
Flash chip SOIC-16 16MiB (128Mbit) 
W+: Works without blobs; 
N: Doesn't work; 
W*: Works with blobs; 
U: Untested; 
P+: Partially works; 
P*: Partially works with blobs
Features
Internal flashing with original boot firmware N
Display (if Intel GPU) W+
Audio W+
RAM Init W+
External output W+
Display brightness W+
Payloads supported
GRUB Works
SeaBIOS Works
SeaBIOS with GRUB Works

Introduction

Unavailable in Libreboot 20230625 or earlier. You must compile from source, or use at least Libreboot 20231021.

Official information about the laptop can be found here: https://support.hp.com/gb-en/document/c03374369

This is a beastly 14" Ivy Bridge platform from HP. NOTE: Until otherwise stated, only the Intel GPU variant is supported in Libreboot.

Build ROM image from source

The build target, when building from source, is thus:

./mk -b coreboot hp8470pintel_16mb

Installation

Insert binary files

If you’re using a release ROM, please ensure that you’ve inserted extra firmware required refer to the guide for that. (failure to adhere to this advice will result in a bricked machine)

Set MAC address

This platform uses an Intel Flash Descriptor, and defines an Intel GbE NVM region. As such, release/build ROMs will contain the same MAC address. To change the MAC address, please read nvmutil documentation.

Flash a ROM image (software)

If you’re already running Libreboot, and you don’t have flash protection turned on, internal flashing is possible.

Flash a ROM image (hardware)

REMOVE all power sources like battery, charger and so on, before doing this. This is to prevent short circuiting and power surges while flashing.

For general information, please refer to 25xx NOR flash instructions.

At this present time, disassembly instructions are unavailable from the Libreboot project, but you can search for HP’s own hardware maintenance manual or look at videos online showing disassembly.

The flash is near the RAM, top side. (sorry, I forgot to take photos when testing this, but they can be added here at a later date)

Markdown file for this page: https://libreboot.org/docs/install/hp8470p.md

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