Some users contact us with a problem that the computer turns on itself when the power is supplied. This is quite rare, but this problem cannot be ignored. Automatically turning on the computer when power is applied can have catastrophic consequences for the computer, for example, the motherboard may burn out. There is also the possibility of losing valuable data on your hard drive. If you experience this problem, it is recommended that you back up your data until you solve it.
How does this problem manifest itself? When you plug your computer into a power outlet, the power supply and motherboard will turn on automatically, but the monitor won't light up until you press the power button on the case. Also during shutdown, you can see that the cooler and all hardware of the computer turns off, but the indicator on the motherboard is still on.
This problem must be resolved as soon as possible before serious damage is done to the computer hardware.
Reasons why the computer turns on itself when power is applied
- Defective power supply. A faulty power supply could be the culprit for this problem. You can test the operation of your power supply with a paper clip.
- Settings problemBIOS. Check the BIOS settings on your motherboard and make sure the correct startup options are set. Next, we'll look at how to do this.
- Defective power button in the computer case. Shorting the wires to the power button in the computer case may cause the computer to turn on automatically when power is applied.
Note: If you hear beeps when you turn on your computer, there is probably a problem with your RAM or hard drive.
Solutions
1. Test the power supply using a paper clip. The video below shows how to do this correctly.
2. Enter BIOS mode on your computer. Then open the tab “ Power", And in the parameter" AfterPowerFailure»Select« StayOff". After that, go to the " Exit", And select" ExitsavingChanges».
3. Check all wires near the power button inside the computer to make sure they are not short-circuited.
If the power supply, BIOS settings, and power button on the computer case are okay, then the problem is most likely in the motherboard. In this case, you must contact the service center.
We hope we helped you solve the problem when the computer turns on by itself when power is applied. Do not postpone solving this problem until later, otherwise more serious problems may arise, for example, the motherboard will burn out.
Recently, a computer was brought to me for diagnostics, which turns on itself when it is plugged into a power outlet. There may be several reasons for this phenomenon - from the simplest error in the BIOS setup, to a hardware malfunction, sometimes leading to expensive repairs. First of all, in this case, you need to find out - after which the computer began to turn on on its own, without having to press the "Power" button. For example, in my case, after a lot of inquiries, I found out that the day before that the client's grandson was sitting at the PC and doing something “in the blue table”. That is, some BIOS parameters have been changed. The problem was resolved in a few minutes and the client left satisfied.
Reason 1. Special function in BIOS
This is the main reason why the computer turns on by itself immediately after plugging into the power supply. It turns on and off in the motherboard, namely, in the "Power Configuration" or "Power Management" section. There should be a parameter called "After AC Power Lost".
Also, depending on the manufacturer of the board and the BIOS version, the parameter may be called:
After AC Power Failure Restore on AC Power loss AC Power Loss Restart AC Loss Auto Restart AC PWR Loss Restart Power Again Power On After Power Fail Power Failure PWRON After PWR-Fail Power State Resume Control System After AC Back State After Power Failure
This parameter responds to the reaction of the computer when the power supply is connected to it and has several meanings:
— Stay off (or simply Off) - the computer will remain off and will not react in any way;
— Power On (or simply On) - the computer will automatically turn on when a voltage appears in the electrical network;
— Last State (or Previous State) Is the last state. If this option is selected, the behavior of the device when plugged into an outlet or when power is applied will depend on what state the computer was in at the time of the power outage. That is, if it was turned off, nothing will change, and if it was turned on, it will turn on again.
So in this way, if you do not want the PC to turn on when plugged into an outlet, set the value "Stay Off".
Cause 2. Hardware failure
Unfortunately, in some cases, the autostart of the computer when the power appears indicates that the computer's hardware is out of order.
Broken power supply
Often on cheap Chinese power supplies there are so-called "breakdowns", in which the PC turns on from an electrical impulse on its own, without pressing the "Power" button. If you have such a power supply, then I strongly recommend replacing it before it is too late, otherwise the next stage may be a breakdown of the motherboard, and this is already a significant expense.
Damaged motherboard
This is the worst possible option and the most expensive. As a rule, spontaneous turning on of the computer (autostart) in this case means problems with the power supply. It can be found both on old motherboards due to swollen capacitors, and on new ones, due to factory defects.
P.S .: If in your house there are frequent surges and drops in the electrical network, then it is imperative to install a voltage stabilizer. Otherwise, even if you replace the components due to a malfunction, then after a short time the problem will repeat again and you will have to change the power supply or the motherboard again.
Greetings, my dear readers.
I will tell you about one interesting feature: automatic power-on of the computer when power appears. Not many people know about it, this is understandable, in everyday life such a need rarely arises. For many of you, one press of a button is enough, and the power-on process will be launched. But what to do when the PC needs to be started without human intervention?
Mains voltage is a great excuse to work your computer
Knowledgeable experts will give you a lot of examples when such a need may arise:
- The computer is the server;
- It is necessary to provide round-the-clock access to the information stored on it;
- Permanently active software is used (video surveillance systems, timekeeping of employees);
- PC works in remote access mode;
Simply put, he is a computer to perform the tasks assigned to it in an automatic mode and without human intervention.
But, unfortunately, force majeure circumstances can intervene in the process in the form of an emergency power cut. The blackout period can last indefinitely, so the reserve as an uninterruptible power supply unit may not be enough.
Therefore, it would not be bad if the computer itself could turn on as soon as the operating voltage is applied to the power supply. This feature, implemented at the software level, is available in modern PCs, and you can activate it by changing the BIOS settings of the motherboard.
Since there are several types of BIOS, I will describe the algorithms for setting auto-power on for the most common of them. To begin with, let me remind you how to get into the BIOS settings menu: when you turn on the computer, press the Del, F2 keys (or others, which the system itself will tell you) several times.
Good old ADWARD-Phoenix BIOS
Let's start with ADWARD, which also has a second name (modification) Phoenix, but both of them mean one product created after the merger of development companies.
Let's start by looking for the "Power Management Setup" section, which stands for power management. Next, we find the sub-item "PWRON After PWR-Fail" and in the column opposite it change the setting by selecting "Power On" (or "Always On" depending on the BIOS version). This will be the function we need.
There is also the Former-Sts (Last State) option, in which the computer will be returned to the state before the emergency shutdown (its analog is present in other BIOS as well).
Real American System
Now let's move on to the BIOS of American Megatrends Incorporated, which is similar in many ways to ADWARD, but has some differences.
Moreover, the versions of the AMI system itself may differ from each other. But since we know exactly what we need to find, it will not be difficult to do this. And we are looking for the "Power On" (or simply "On") mode for the "Restore on AC Power Loss" setting.
And now, just depending on the release date of the BIOS AMI, you can find it in different sections:
- In the main menu "Power Management Setup" (for V4.3);
- The desired menu is "ARM Configuration" and is located in the "Power" tab (for version # 0401);
- Select "ACPI Configuration" in the "Advanced" section (for P1.80 2011).
We work in comfortable UEFI
By the way, the last search route is also relevant for some UEFI BIOS, which is more modern, and more understandable for many (and in some versions it is generally Russified). But we are now interested in an incomprehensible English-language version.
So, having found yourself in such a BIOS, you need to activate the advanced mode: press the "Advanced Mode" key or simply F7 (Just in case, take a look carefully, and did the "System language" option appear in the "System language" to change the language to your native one).
- Advanced tab;
- Section "APM" (penultimate point, do not miss);
- Bah, all familiar faces, our favorite (for today) item « Restore on AC Power Loss "!
- Of course, we set the "Power On" setting for it;
So, in just a few clicks you can set the computer to turn on automatically when power appears. But in fact, you will have to make more clicks. Do not forget to save the changes made to the system (sometimes it is enough to press F10 in the BIOS for this).
If you come across BIOS versions that are not presented in this review, then I propose to study several names that mean the function we are interested in:
- Power State Resume Control
- State After Power Failure
- PWRON After PWR-Fail
- AC Power Loss Restart
- AC Back Function
- System After AC Back
- After AC Power Lost
- After Power Failure
- Power failure
- AC Loss Auto Restart
- Power On After Power Fail
- Restore on AC Power Loss
- Power again
- After AC Power Loss
Knowing them, you can easily find the settings you need.
Something else
If you show additional interest in the settings, you can note that by activating the "Restore on AC Power Loss" mode, you have the opportunity to set the days and times when your computer will turn on. But this option is rarely used.
This concludes my post on auto-activation. Hope I helped those who were looking for an answer to this question.
In addition, I hope that readers who know about this function for the first time will be able to use it to their advantage.
Good luck to everyone and see you soon on the pages of my blog.
The idea of \u200b\u200bsetting up a computer so that it automatically turns on at a specified time comes to many people. Some want to use their PC as an alarm clock in this way, others need to start downloading torrents at the most favorable time according to the tariff plan, and still others want to schedule the installation of updates, virus scanning or other similar tasks. How these desires can be realized will be discussed later.
There are several ways in which you can configure your computer to turn on automatically. This can be done using tools available in the computer's hardware, methods provided in the operating system, or special programs from third parties. Let's analyze these methods in more detail.
Method 1: BIOS and UEFI
The existence of BIOS (Basic Input-Output System) has probably been heard by everyone who is at least a little familiar with the principles of computer operation. She is responsible for testing and regular inclusion of all components of the PC hardware, and then transfers control of them to the operating system. BIOS contains many different settings, including the ability to turn on the computer in automatic mode. Let's make a reservation right away that this function is not present in all BIOSes, but only in more or less modern versions of it.
To schedule the launch of your PC on the machine via BIOS, you need to do the following:
The BIOS interface is now considered obsolete. In modern computers, it has been replaced by UEFI (Unified Extensible Firmware Interface). Its main purpose is the same as that of BIOS, but the possibilities are much wider. It is much easier for the user to work with UEFI thanks to the support for the mouse and the Russian language in the interface.
Configuring the computer to turn on automatically using UEFI is as follows:
Configuring automatic power on using BIOS or UEFI is the only way that allows you to perform this operation on a completely turned off computer. In all other cases, we are not talking about turning on, but about bringing the PC out of hibernation or sleep mode.
It goes without saying that the computer's power cord must remain plugged into an electrical outlet or UPS for the auto power on to work.
Method 2: Task Scheduler
You can also configure the computer to turn on automatically using Windows system tools. For this, the task scheduler is used. Let's see how this is done using the example of Windows 7.
First, you need to allow the system to automatically turn on / off the computer. To do this, open the section in the control panel "System and safety" and in section "Power supply" follow the link "Setting the transition to sleep mode".
Then in the window that opens, follow the link "Change advanced power settings".
After that, find in the list of additional parameters "Sleep" and there set permission for wake timers to state "Enable".
Now you can configure a schedule to automatically turn on your computer. To do this, you need to do the following:
- Open the planner. The easiest way to do this is through the menu. "Start", where there is a special field for searching programs and files.
Start typing the word "scheduler" in this field so that a link appears on the top line to open the utility.
To open the scheduler, just click on it with the left mouse button. It can also be launched via the menu "Start" - "Standard" - "Service", or through the window Run (Win + R)by entering the taskschd.msc command there. - In the planner window go to the section Task Scheduler Library.
- On the right side of the window, select "Create task".
- Come up with a title and description for the new task, for example, "Turn on the computer automatically". In the same window, you can configure the parameters with which the computer will wake up: the user under which the system will be logged in, and the level of his rights. As a third step, be sure to specify the operating system to which the action of this task will be applied, in other words, the version of your Windows.
- Go to the tab "Triggers" and click on the button "Create".
- Set the frequency and time for the computer to turn on automatically, for example, every day at 7:30 am.
- Go to the tab "Actions" and create a new action by analogy with the previous paragraph. Here you can configure what should happen when the task is executed. Let's make it so that some message is displayed on the screen.
If you want, you can configure another action, such as playing an audio file, launching a torrent, or another program. - Go to the tab "Conditions" and check the checkbox "Wake up the computer to complete the task"... Check other boxes if necessary.
This point is key when creating our problem. - End the process by pressing the key "OK"... If the general parameters specified a login under a specific user, the scheduler will ask you to specify his name and password.
This completes the configuration of automatically turning on the computer using the scheduler. The appearance of a new task in the list of tasks of the scheduler will be evidence of the correctness of the actions performed. 
The result of its execution will be the daily wake-up of the computer at 7.30 am and the display of the message "Good morning!"
Method 3: Third Party Programs
You can also create a computer schedule using programs created by third-party developers. To some extent, they all duplicate the functions of the system task scheduler. Some have significantly reduced functionality compared to it, but compensate for this with ease of configuration and a more user-friendly interface. However, there are not so many software products that can wake up a computer from sleep mode. Let's consider some of them in more detail.
A small free program with nothing superfluous. After installation, minimizes to tray. By calling it from there, you can configure the schedule for turning on / off the computer.
Thus, the computer will be scheduled to turn on / off regardless of the date.
Auto Power-on & Shut-down
Another program with which you can turn on your computer automatically. There is no Russian-language interface by default in the program, but you can find a crack for it on the net. The program is paid, a 30-day trial version is offered for review.
WakeMeUp!
The interface of this program has functionality that is typical for all alarms and reminders. The program is paid, the trial version is provided for 15 days. Its disadvantages include the long absence of updates. In Windows 7, it was only able to run in Windows 2000 compatibility mode with administrative rights.
This concludes the consideration of ways to automatically turn on the computer on a schedule. The information provided is enough to guide the reader in the possibilities of solving this problem. And which of the ways to choose is up to him.
Today there is a sufficient amount of software with which we can control the automatic turning on of the computer on a schedule. But I want to note that automatic switching on of the PC using programs is possible only when it is in "sleep" mode.
That is, the computer that is in "sleep mode", as it would be easier to say it, is already on. It just "wakes up" and does not turn on.
It turns out (I was ashamed not to know this :)), you can configure the computer to turn on automatically according to a schedule and even when it is COMPLETELY OFF! Modern BIOSes that come with PC motherboards have settings for automatically turning on a turned off computer on schedule.
At the dawn of my acquaintance with computers (since 1995) one could only dream of such a BIOS setting. For what purposes you can use turning on the computer on the machine, you decide.
For example, from the most commonplace - using a PC as an alarm clock, turning on for distributing or downloading torrents while you are away, servicing your computer, or even when you are at work or on a business trip, etc.
Note that the fourth computer I tested, bought 6 years ago, did not yet have this opportunity. Let's now go directly to the BIOS settings.
How to enter BIOS depends on the configuration of your motherboard, mainly by pressing the Delete or F2 key on the keyboard at the initial stage of computer boot. You can see the hint on the necessary keys immediately when you turn on the PC.
AUTOMATIC POWER ON OF THE COMPUTER
BIOS American Megatrends Inc. P1.80, 05/20/2011... Go to the "Advanced" section and select "ACPI Configuration".
Turn on the “Restore on AC / Power Loss” setting in the “Power On” position.
We activate ("Enabled") the setting of auto-enable "RTC Alarm Power On".
We choose to turn on the computer every day ("Every Day") or on a certain date within the current month in the "RTC Alarm Date Every Day" settings. We configure the time to turn on the PC: "hour / minute / second" in "RTC Alarm Time".
After completing the settings, press the F10 key or the item "Save Changes and Exit" and "OK" to save the settings and restart the PC.
BIOS American Megatrends Inc. V4.3, 21.10.2009... We need the "Power Management Setup" section, go to it.
Turn on the “Restore On AC Power Loss” setting.
We activate "Resume By RTC Alarm".
We set the inclusion for every day or on a specific date of the month in the "Data" setting and hours / minutes / seconds in "HH: MM: SS".
We save the settings and exit the BIOS using F10.
BIOS American Megatrends Inc. 0401, 05.05.2010... In the "Power" section, go to "ARM Configuration".
We activate "Restore on AC Power Loss" to the "Power On" position.
We activate "Power On By RTC Alarm".
The settings for daily switching on at certain hours / minutes / seconds become available.
Or a specific date, hours / minutes / seconds.
If you no longer need to use scheduled automatic power on, simply disable ("Disabled") the "Power On By RTC Alarm" setting.
Unfortunately, these are all versions of BIOS versions on which I was able to test the function - automatically turning on the computer. If you have a different basic input / output system (BIOS), then you already know where to "dig". And finally, I suggest watching a short video