dynabook PORTEGE X40-J Series Maintenance Manual

Maintenance Manual (960-942) G-1
Appendix G
BIOS Rewrite Procedures
This Appendix explains how to rewrite the system BIOS program when you
update the system BIOS.
G.1 Tools
To rewrite the BIOS, you need the following tool:
■ BIOS/EC/KBC rewriting disk
G.2 Rewriting the BIOS
1. Turn off the power to the computer.
2. Remove the external cables and cards.
3. Set the USB Flash Memory containing BIOS rewriting data.
4. Turn on the power while holding down the tilde character key or 半 / 全
key Until LED blinks
For example
(US Keyboard)
(UK Keyboard)

dynabook PORTEGE X40-J Series Specifications

General

Graphics	Intel Iris Xe Graphics
Wireless	Wi-Fi 6 (802.11ax), Bluetooth 5.1
Processor	Up to 11th Gen Intel® Core™ i7 Processors
Display	14.0" FHD (1920 x 1080) Anti-glare
RAM	Up to 32GB DDR4
Storage	Up to 1TB PCIe SSD
Operating System	Windows 10 Pro
Weight	Approx. 1.05 kg
Security	Fingerprint Reader, TPM 2.0
Ports	2 x Thunderbolt 4, 1 x USB 3.2, HDMI, microSD card slot