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Turn off the laptop. Unplug the AC adapter. Remove the external battery (if applicable). Open the back cover and disconnect the small coin-cell CMOS battery from the motherboard. Hold the laptop's physical power button down for 60 seconds to drain remaining capacitance. Replug everything and turn it on. The first boot may take up to 3 minutes as memory training occurs. Issue: "Error: ROM file size does not match"
Allow the system to automatically cycle power. It may turn on and off several times before displaying the boot logo. 7. Troubleshooting and Post-Update Steps Initial Post-Flash Boot Delays clevo laptop bios update
For enthusiasts and power users, the stock Clevo BIOS feels restrictive. A vibrant community has created "unlocked" or "modded" BIOS, often referred to as the (named after the developer Prema). These versions unlock hidden menus, allowing for overclocking, undervolting, and other advanced tweaks. Turn off the laptop
If Windows BitLocker encryption is active, suspend it. A BIOS update changes the hardware cryptographic signature, which can lock you out of your hard drive. Open the back cover and disconnect the small
Some BIOS update packages also include an update for the firmware. The EC manages low-level system functions like fan speeds, battery charging, and keyboard input.