Lenovo S405 boot boot card, a grub input command appears on the second page, and the machine is not

Dear Lenovo users, hello!

For this problem that is displayed when you boot up, it may be that the fan number of the partition was not handled properly when you installed the system, and it is recommended that you back up the data and repartition it before installing the system. If your favorite computer is Win8 to Win7, it is recommended that you restart the computer first and then enter BIOS 1, enter Security-Secure Boot-Disabled

2. Go to the Startup-UEFI Legacy Boot option, change it to Both, and select UEFI Legacy Boot Priority as UEFI FIRST

3. Click F10 and select Yes, save the BIOS settings and exit.

IDEA Forum.

Think Forum.

Lenovo Community.

You can try entering the following commands in sequence:

find --set-root /bootmgrchainloader /bootmgr

If boot doesn't start, it means that there may be something wrong with your win7 boot part. If the boot is successful, then the way to fix the win7 boot by yourself.

Grub bootstrap linux system? Have you ever moved the drive letter?

Turn off completely, press and hold the volume down + power button to power on! into recovery!

Wipe Data Factory Reset Empty the data partition and restore the factory settings.

If not.

Try it with a different battery, but this is unlikely!

Try to connect to the computer with a data cable first, if you recognize it, you can try flashing it!

Hardware problems are also not ruled out, because the phone will burn out the CPU and so on if it heats up!

Dear Lenovo mobile phone users, hello!

If the mobile phone can not enter the system after turning on the fixed screen, if it still cannot be turned on normally after plugging out the battery, this situation may be caused by 2 factors:

1) The system process is abnormal and the system cannot be accessed 2) The system data cannot be loaded due to the abnormal data of the motherboard. The first possibility will be relatively large, it is recommended that you go to the site to flash the machine, and at the same time let the engineer specifically detect and deal with it.

Official website authorized maintenance site inquiry:

If the Lenovo tablet is turned on and the screen is fixed, if the tablet is restarted, click the reset button to force shutdown and restart, etc., it is invalid, then contact the Lenovo mobile phone after-sales site for testing.

1 Hello all, it is recommended that you check whether the power management has set a charging threshold. If you change the threshold and still can't charge, it may be a battery problem, it is recommended that you go to your local Lenovo service station to check it, and the service station staff will solve the problem for you.

Hope it helps you and I wish you a happy life.

The battery life is long, and you don't need to leave it at that.

Hello, you can adjust the screen brightness via F11 F12.

Just set the brightness. Settle down on the fn and click the arrow keys corresponding to the brightness button.

Problem Solved To get the repair station to upgrade the firmware mine has been solved.

This is because the S405's BIOS is designed for Win8'To upgrade the BIOS'to be solved'It's best to get Lenovo after-sales'It's risky to upgrade yourself'My computer is like this too'It was fixed today'

Hello, in order not to affect your normal use, it is recommended that you go to the nearest Lenovo computer customer service center, and the engineer will help you detect and solve it. Lenovo computer service outlets.

The quality of the phone is not up to par.

It should be a problem with the motherboard, or else a problem with the speaker.

You can take it to the store for after-sales, and they will give you a good solution.

And try not to take it for repair, because as long as the mobile phone is brushed or disassembled, the manufacturer will not do after-sales.

Since the manufacturer will not do after-sales, then the store will definitely not do it.

There may be a problem with the hard drive, and so is mine, it is recommended to go to the after-sales service to test it as soon as possible, don't wait for the broken things to be gone, it will be too late.