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The fan failed before the boot prompt of Dell computer, and you need to press F 1 to enter. How to solve it?
Prompt the cpu fan to detect an error, and press F 1 to skip entering the system.

Turn on the computer and see if the fan speed is normal. If it is normal, enter the bios shutdown test.

Select CPU fan disable in IOS- power-hardware monitor.

The location may be different, but the CPU fan disable should be the same.