How to Update & Restore BIOS DMI – In Laptop Repairing Course by Multitech Institute In the Laptop Chip Level Repairing Course, students learn how to update and restore BIOS DMI (Desktop Management Interface), which is very important for system identity (like serial number, model number, etc.). ✅ Update & Restore BIOS DMI Process: 1️⃣ BIOS Programmer: Use a BIOS programmer tool (like RT809H, EZP2019, etc.) to read and write the BIOS chip. 2️⃣ Read Original File: First, read and save the original