The computer is asleep, but it can t wake up, how to solve it

When the computer is not in use, it is often put to sleep or hibernate in order to save power and to quickly restore the computer when it is needed.

Workaround for laptop won't wake up:

Run the command line program to check whether the computer supports the sleep wake-up function, run [powercfg -a] enter under the cmd command, and then see if the computer device supports sleep wake-up; <>

After confirming that the computer supports the wake-up function, it may be: the wake-up function of the computer mouse or keyboard is not enabled;

Open [Device Manager] and find devices such as mouse and keyboard; <>

In the mouse properties interface, select [Power Management Options], and remember to check "Allow this device to wake up the computer" in the option; <

The network adapter can also wake up the computer. If you need it and the network card has data transmission, you can also check the option of [Wake up the computer with the network card]; <>

If the above process is all right, but it still can't wake up the computer. Then you have to consider the driver of the hardware device.

1 5 step by step reading.

First, please run the command line.

The program checks whether its computer supports the sleep wake-up function in the cmd command.

Run "powercfg -a" and see if your computer device supports sleep wake.

After making sure that your computer supports the wake-up function, you need to pay attention to the possibility that the wake-up function of the computer mouse or keyboard is not turned on, so the next step is to enter the device manager.

Locate devices such as a mouse and keyboard.

In the mouse properties interface, we will see the power management option, in which remember to check "Allow this device to wake up the computer".

Note that the network adapter.

It is also possible to wake up the computer, so if necessary, you can also check the option to wake up the computer on the network card, if the network card has data transfer.

Finally, warm reminder, if the above process is fine, but still can't wake up the computer, then you have to consider the driver problem of the hardware device, it is recommended to use the driver wizard.

The software checks the hardware drivers and checks for Windows updates.

Right-click on the blank space of the desktop, select Properties - Screen Saver - Power, click the power button to enter the power management page, and set the item to "Never" to turn off the hard disk.

Install the Driver Wizard directly.

The computer does not wake up from sleep.

Causes a black screen after standby.

The main reasons for not being able to wake up are as follows:

1. If there is no external power supply; It may be that the battery is out of charge, just connect it outside.

Just plug it into the power supply.

2. If you can't wake up when connected to the external power supply; The battery can be removed. Then connect an external power supply to power it on.

3. It is possible that the machine has a hardware failure; There are mainly hardware reasons for this; motherboard and motherboard power failure; Or a faulty display. We basically don't judge the failure of this kind of hardware. It can be sent to a professional for overhaul.

Here's the difference between System Standby and System Hibernation.

1. System standby: temporarily stop operating the computer for a period of time, and the computer will enter a power-saving mode when there is no work to do, but it will immediately enter the working state when performing operations such as tapping the keyboard and moving the mouse.

When the system is in standby, the data that is currently running is stored in memory, and the machine only supplies power to the memory, while components such as hard disks, screens, and CPUs stop supplying power. Since the data is stored in fast memory, it is faster to enter the waiting state and wake up. However, this data is stored in memory, and if the power is cut off, the data will be lost.

2. System hibernation: Computer hibernation is when the computer is not operated for a long time, the computer stops working and turns off the power of most components, at this time, you need to press the wake up button to wake up the computer and enter the working state.

When the system is hibernating, the computer will save the data that is currently running in the hard disk, and the power supply of the whole machine will be completely stopped. Because data is stored on the hard drive, which is much slower than memory, it is relatively slow to go to sleep and wake up, and you can completely disconnect the power of your computer while you are sleeping.

When you use sleep mode, you can turn off your computer and be confident that when you come back, all your work will be completely exactly restored to the state it was in when you left it. The contents of the memory are saved on disk, and the monitor and hard disk are turned off, which also saves power and reduces the wear and tear of the computer.

But sometimes the computer sleeps and you can't wake up. Below, let's take a look at the main reasons why the computer can't wake up after sleep and how to solve it.

The computer can't wake up after hibernation (the main reason).

1. Caused by system settings.

2. This function is not supported by the system firmware.

The computer can't wake up after hibernation (workaround).

1. Check if your computer supports this function!

How to view: Click "Start" - Run"; Then type in "cmd" and click OK!

Then type "powercfg -a" in the command window, remembering that there is a space in front of it; Press "Enter" when you're done; The results showed standby (s3); Explain that your machine supports the sleep function. If not, you need to contact the computer manufacturer to upgrade the blos.

2. System setting solution:

In many cases, it is because this feature is not turned on. Right-click on My Computer, then select Manage!

Then open "Device Manager" - "Mouse and other pointer devices" in turn. Then right-click and select Properties.

Then switch to "Power Management" and tick the box!

The computer display can be operated as follows to return to normal from sleep mode

1.If the computer is running: It is normal for the display to automatically enter sleep mode when the computer enters standby mode.

To recover, simply press enter on the keyboard or press the left mouse button. If the above operation does not work, you need to short press the power button of the host.

This is often due to poor contact due to loose or oxidized memory modules, or poor contact of the display data cable, or damage to the memory, graphics card, display, or data cable.

3.After the computer enters sleep mode, the energy consumption will be reduced to very small, at this time the hard disk and other devices will stop working, and the CPU will also enter a low-power state, at this time, the computer can be woken up in the following ways:

4.Wake up with the keyboard, generally speaking, you can wake up the computer by pressing any key.

5.Wake up by email, some computers, with mail you can wake up a sleeping computer.

6.Press the power button to wake up.

Many reasons, to name a few:

1. Check whether the hardware supports it.

2. A command window pops up. Type powercfg -a in it and press enter.

3. Let's take a look at the results of the operation:

Let's take a look at the above result. The display of Standby (S3) here indicates that your machine supports the sleep function.

If your hardware doesn't support sleep, you may need to contact your computer manufacturer to upgrade your BIOS. By the way, most of the newly bought computer hardware.

Basically, it can meet the requirements of computer sleep.

2. Check which devices are able to wake up the computer.

Then hit powercfg -devicequery armed wake and press enter.

2. Let's take a look at the results of the operation:

Let's take a look at the above result. There are two that can wake up the machine in the current situation, which we mark with A and B. a is a mouse device, which means that the mouse can wake up the machine.

b is a network card, which means that the machine can also wake up from the network (this general slippery companion is only used in the corporate environment).

If the mouse device is not listed, the machine cannot be woken up with the mouse. We need to turn on the wake-up function (continue reading below).

3. Turn on the wake-up function of the device.

Enter. 2. After the device manager is opened, a string of devices will be listed. Find the one that corresponds to your mouse and right-click to see the properties.

3. Click on the power management tab, check the device to wake up the calculation slag machine, and then press OK to exit.

1. Once the computer sleeps, it can't wake upSolution:

Restart the computer, enter the PowerManAgent Setup item of the CMOS, change the default value of the Fan OffIn Suspend item to Enabled to Disabled (the CPU fan rotates correctly when entering the energy-saving mode), and then enter the Windows test machine, and the problem of not waking up is solved.

Second, once the computer sleeps, it can't wake up The possible reasons for the problem are:

1) The power management options in the BIOS setup program are set incorrectly.

2) The "Power Management" item in the "Control Panel" is set incorrectly.

3) There is a problem with the power supply.

4) When entering the energy-saving mode or sleep mode, the CPU fan stops and the CPU temperature is too high.

<> if the computer can't wake up after sleeping, and the screen doesn't light up, you can try the following solutions: check the settings, update the driver, restart the computer, etc.

1. Check the settings. Go to Power Options, see if the power plan settings are correct and make sure "Enable Wake Up Computer" is checked. If it's not checked, your PC might not wake automatically after sleeping.

In addition, you need to make sure that your mouse, keyboard, or other external device can wake up your computer. You can also try restoring your computer to factory defaults and resetting the operating system's power options.

2. Update the driver. The sleep-wake issue may be related to the device driver losing grip. So, you can fix the problem by updating drivers such as your monitor, sound card, and motherboard.

Check if the following device drivers need to be updated: monitor, sound card, motherboard, graphics card, network card, etc.

3. Restart your computer. If none of the above methods solve the problem, you can try restarting the computer or manually force shutting down the computer to solve the problem. After you restart your computer, try to go to sleep again and try to wake your computer.

Expand your knowledge: 1. If none of the above methods can solve the problem, you need to check whether there is a problem with the computer hardware. When the computer is sleeping, the computer may not wake up properly due to insufficient memory, power supply problems, or motherboard failure.

If it is a problem with the power supply, you can try to replace the power supply; If it is a motherboard failure, then the motherboard needs to be replaced.

2. Due to the sleep mode, some hardware devices of the computer will be in a power-saving state, at this time, frequent use of sleep mode may lead to the failure of hardware devices. Therefore, it is recommended not to use sleep mode frequently, and it is best to restart the computer regularly if you need to hibernate .

Win7 system comes with a sleep function, and many users also like to use this function, because it can save power and improve work efficiency. However, the computer cannot be woken up after using sleep in the win7 system, resulting in the system not running normally, the specific solution is as follows:

1. Click the power icon in the lower right corner of the desktop, right-click and select the power option.

2. After that, a window pops up, select "Change Plan Settings".

3. Click "Change Advanced Power Settings".

4. This window pops up, click the "+" sign, there are only two items in the sleep without opening, and the window is closed at this time.

5. Press win+r to open "Run".

6. Then type "powercfg -h on", OK, at this time a window flashes, and your hibernation option is opened.

7. Click the power icon in the lower right corner of the desktop, right-click and select the power option.

8. After that, a window pops up, select "Change Plan Settings".

9. Click "Change Advanced Power Settings".

10. Sleep has been turned on, re-enter the interface just now to check, and find that sleep has been opened.

1.If the interrupt used by the keyboard or mouse is not set to wake up, the solution is to go to the "Power Management Setup" setting screen of the BIOS and turn on the IRQ wake-up function of the relevant devices under the "PM Events" option, i.e. set IRQ3, IRQ4, IRQ5, IRQ6, IRQ12, IRQ14 and IRQ15 to "Enabled".

2.If there is a conflict between the device drivers, it is recommended to uninstall the old drivers; The driver is not compatible with the installed hardware, please replace or upgrade the driver.

4.There is a problem with the operating system, and perhaps installing a patch will fix the problem.

5.If you can't wake up after a little longer after hibernation, it is likely that the CPU fan is stopped and the CPU has not entered the corresponding sleep mode as required, causing the CPU temperature to be too high, resulting in the computer not working properly. This phenomenon mostly occurs in computer systems that monitor CPU temperature and CPU fans.