Teach you why you must press F1 to enter the system

If you have not pressed F1 before, press F1 to indicate that your motherboard CMOS battery is dead.
At the beginning of the boot, press DEL to enter the BIOS, press Enter to enter the first item, and see if the “Drive A” option is “None”, if not, press “Pgup” or “PgDn”; PgDn” Make changes, modify and press “ESC” to exit, select “Save & Exit Setup" and press Enter to exit the BIOS, reboot, and then change the battery and then follow the above steps to reset.
Booting needs to press the F1 key to enter, mainly because the BIOS settings do not match the real hardware data, can be divided into the following situations:
1, there is actually no floppy drive or floppy drive is broken, and the BIOS There is a floppy drive in it, which causes you to press F1 to continue.
2, originally hanged two hard drives, set up in the BIOS into a dual hard drive, and later lost one of them but forgot to change the BIOS settings back, this problem will also occur.
3, the motherboard battery is not powered, it will also cause data loss and this failure.
4, restart the system, enter the BIOS settings, found that the floppy drive is set to 1.44M, but in fact there is no floppy drive in the chassis, set this to NONE, troubleshooting.
Saying that it is a system problem, it means that he does not know the principle at all. Let you tell Baidu that he does not want to help you or not. A patient who encounters a quack will only mislead you.
I have dealt with computers that have been repaired by thousands of households. According to my experience, I have said the above.