How to turn off Lenovo B490 POST

<> workaround:

Press F1 to enter the BIOS, press -> (left click) to select the second menu, and set the OnBoard LAN boot ROM to disabled.

After installing the 8139 network card, "Client Mac Addr:00 14 2A A3 52 31....dhcp...

pxe-mof", directly click "esc"You can also enter the system, but the solution is not necessarily to modify the first driver to CD-ROM.

Here's how: If the NIC is integrated on the motherboard, or if the boot program on the network is written into the BIOS, you can modify the boot order of the system from the BIOS settings, such as setting the hard disk to boot first, or disabling the NIC from booting the system from the BIOS. Go to BIOS to find LAN boot ROM and select Disable!

If the NIC is not integrated, you can unplug the boot chip on the NIC or use the NIC to set up the program, disable the bootrom boot function of the NIC can also be turned off, and then after booting, when "press shift-f10 configure...... appears, immediately press the "Shift+F10" key combination, after entering the menu, set the Boot Order ROM to Disable from line 4, and then press the F4 key to save and exit.

1. Power on and press F12 to enter the BIOS.

2. Move the options in the BIOS to "Load Optimized Default" and press Enter.

3. Select "OK" and press enter to restore factory settings.

It is recommended that you check if the laptop has power, and then it is recommended that you do electrostatic discharge for the notebook: (removable battery).

Unplug all external devices (including power cords and batteries) from the host, press and hold the power button for 30 seconds, and then connect all external devices to power on for testing.

Notebook (non-removable battery):

If your laptop has a built-in battery, there will be a reset hole, use a straightened paper clip to insert into the reset hole, press it for a few seconds, and turn it on for testing.

If your problem is not solved, you can complain, put forward your valuable opinions, and then transfer to manual service.

Cause Analysis:

The main reason for going directly to the BIOS when booting up is that there is a problem with the settings of the host BIOS. Some computer motherboards are set up to be more user-friendly, so many other functions have been added. When the BIOS is not set up correctly, restarting the computer will automatically enter the BIOS.

Solution: Since it is caused by the BIOS settings, you only need to set it in the BIOS to solve the problem. When the computer is powered on and enters the BIOS, select the options with similar words such as load fail-safe defaults, load optmized defaults, restore defaults, etc., and press "F10" to save and exit after selection.

Tutorial for BIOS factory reset.

If the above methods still can't solve the problem, it is recommended to restore the BIOS to factory settings.

Dear Lenovo users, hello:

Please boot the computer and press F8 to enter the safe mode, see if it will appear, if not, after entering the system normally, clean mode starts, if it also appears in safe mode, restore the BIOS default settings, backup data, and reinstall the system.

22.Clean mode: The specific setting method is, press the win+r key, enter msconfig, select disable all under the startup tab, under the service tab, check Hide all Microsoft services, select disable all, shut down to view, if the clean boot mode is normal, you can select the loaded items and services one by one, confirm the items that cause the shutdown, uninstall the corresponding software, or disable it.

IDEA Forum.

Think Forum.

Lenovo Community.

I've had this kind of problem before, I can't turn off the forced shutdown, I can only pull out the battery, and then restore the system.

The shutdown command was not executed, it may be a system issue, and it is recommended to reinstall the system.

Dear users, hello!

Find the most authoritative, professional answers.

Turn off auto-restart Windows XP automatically restarts in the event of a critical failure such as a system or program that stops responding. In order to prevent automatic restart in this case, this function can be disabled. Here's how:

Open the Control Panel, select Performance and Maintenance System in the classification view to open the System Properties dialog box. Click the Advanced tab, and under Startup and Failback, click the Settings button. Under System Failure, clear the " before the Auto Restart check box

Click OK to be logged in as an administrator or administrators group member.

First, check the advanced power settings in the BIOS again to determine the automatic wake-up function and the automatic restart function for illegal shutdown;

Second, in the system, click My Computer, Properties, Advanced, Settings, and turn off the automatic restart function if the system fails;

Third, enter the safe mode, if it does not restart after shutting down, continue to check the system reason, if it is restarted after shutting down, see four;

Fourth, try replacing the power supply.

Five,If none of this works,Let's cry together Haha,You said it's not poisonous.,SP2 doesn't need to be patched with a blaster.,But you can also suspect other viruses.。。。

Answer: The most common reason for automatic restart after computer shutdown is caused by rapid shutdown. The solution is:

Start Run Enter: msconfig OK System Utility Configurator Advanced Check "Disable Rapid Shutdown" to restart your computer. If it doesn't work out yet, see if there's a driver or hardware error.

May my answer solve your worries.

1. If you appear this pop-up box, it means that your startup item is wrong, and the application cannot be opened normally during the startup process.

2. The solution is very simple, delete this item in your startup items, or clean up your registry and repair this application again.

3. If you don't know how to modify the startup items, then you can ** a Tencent PC Manager, open Tencent PC Manager - Computer Acceleration--- one-click and dislike optimization --- startup items--- find the application to prohibit startup.

If you are not satisfied with my answer, you can continue to ask questions or give valuable comments, thank you.

1.Rebooting the phone is preferred. The general operation method is to press and hold the power button for a few seconds, or you can pull out the battery and forcibly shut it down and start it again.

2.Factory reset. Factory reset will lose contacts and text messages, so you should back them up before using this feature.

3.Flash. There is a risk in flashing the machine, study it clearly before operating, or find an official maintenance point for maintenance. You should also back up your data before flashing.

Don't delete files that you think are unnecessary, some crashes are caused by users mistakenly deleting system files.

Smartphones have a lot of storage space, but try to store a large number of text messages and large-sized ** in the mobile phone into memory or memory cards, and don't occupy too much body memory.

Dear users, hello!

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