Is it normal for a Lenovo computer to boot up like this?

It is normal because there is another DOS system installed on the computer, which is equivalent to a dual system, so the computer needs to manually start one of the systems.

Solution: "My Computer" right-click, "Properties" Advanced, Startup and Failure Recovery "Settings", display the time of the operating system list, remove the check, and you're done.

Normal. If you don't need it, you can set it up.

My Computer --Properties --Advanced --Boot & Failback --Settings--Show the OS list of time ticks, or set the time you need.

No problem, all the dells in our unit are like this, it is a function of power protection.

The display is flashing because the switch is not turned off, which is normal.

However, the main engine will not have a start-up sound when it is powered on. Look at a few more units, if it's all like this, there's nothing to say.

Generally, there is no problem, and some motherboards are fine when they are powered down. Besides, you don't want that one, after all, you are a customer, and you can change to a new one.

It may be that the monitor is not powered off, and it is the sound of the monitor, not the sound of the computer starting.

A little bit of a problem. But I don't think I'll sell you a sample machine. You try another one.

You've seen it yourself, and you think it's not normal, and you still need to ask.

Straight to the next one, I guess it's a problem with the display circuitry.

There may be a problem with the startup item, something may be wrong, and there may be a problem with the hard disk.

1. Press F8 immediately after booting to the advanced option that appears in the let go, and select "The latest correct configuration" to enter.

2. If you can't press F8 to enter safe mode, temporarily close all startup items. Uninstall all non-system programs.

3. If you still can't press F8 to enter safe mode, uninstall the graphics card and network card driver.

4. If it really doesn't work, format the C disk and reinstall the system. Laptops generally have one-click recovery.

If your computer can't boot normally, there should be the following reasons: 1. If you have reinstalled the system and the same problem still occurs when you restart, you should consider that there is a problem with the hardware of your machine. You can start the system after the self-test screen appears, press the F8 key, choose to enter the "safe mode", after entering the system, right-click on the desktop "My Computer - Properties - Hardware - Device Manager" on the desktop, check whether your hardware has a question mark or yellow exclamation mark or something like that, if so, directly delete or follow the brand chip of your machine hardware, install the driver on the random CD, and then restart.

2. Use the boot disc to boot the system to DOS for a thorough antivirus. Because you may not have a full anti-virus of all partitions when you reinstall, although you format the system partition, you can rule out that the system partition does not have viruses, but the viruses of other partitions still exist, and when you use it, the system is infected by viruses, causing system damage or even crashing. 3. When the voltage is unstable, you use the machine, which has caused damage to the hardware of the machine, and the best way is to use the replacement method to determine.

That is, replace the memory with the same memory, replace the hard disk with the hard disk, etc., and replace the damaged objects one by one to eliminate errors. 4. This is not a way to deal with mistakes, but sometimes it is useful, that is, to clean your love device once and replace the board again. I have encountered that I can't find the reason, but the machine always reports an error, even the system can not enter, use the software to check under the dos, the competition report that the hard disk is wrong, as a result, I plugged all the boards and wiring back into the box again, and then except for the dust, there is no problem.

Boot Windows normally

If it doesn't work, you'll have to reload.

The error location is in the system directory, and the power is off when the power is turned on?

Oh you can also try to fix the system, it's a bit slow, maybe it will be fixed.

If the notebook fails to start, you can troubleshoot it as follows:

1) First remove the battery, unplug the power plug, press and hold the power button for about 5 seconds, then plug it in to see if it can be turned on, if it still can't be turned on, continue the following steps.

2) Remove the battery, unplug the power plug, and open the back cover screws with a Phillips screwdriver. There is an opening on one side of the cover, and the cover can be removed by gently cocking it along the opening with a screwdriver.

3) After removing the cover, find the memory module, and use a screwdriver to gently remove the clips on both sides of the memory module, so that the memory module can be released. Gently remove the memory module and wait a few moments before putting it back on.

4) Cover the cover plate in reverse according to the disassembly method, install the battery, and turn on the power button to restart.