* Tim Zander t.zander@uea.ac.uk [130611 02:50]:
Hardware Preparation
Open the case You'll now have to disassemble your device (which mostlikely voids your warranty). Disable write protect You'll have to locate the Write Protect jumper and enable it. This will make the BIOS read-write so you can update it. Once things have been updated, you can undo this so your BIOS is read-only again. Reassemble the device Now that you've done toggled the jumper, you need to reassemble the device and power it up. Check the write protect Run crossystem and look at the wpsw_cur field; it should be 0. Plug your system in to be safe! For the Chromebook laptop, make sure the battery is charged, and the power supply is connected. For the Chromebox, try and plug it into a battery backup (UPS), and don't try this during a storm :).
see http://www.chromium.org/chromium-os/developer-information-for-chrome-os-devi...
for location of jumper
Stumpy / Lumpy had a jumper. On the Pixel it's a screw next to the USB port.