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Automatically turns on your computer when power comes on - don’t let your computer sit idle. The computer turns on automatically when power is applied (Solution) Turning on the system after power returns

Some users contact us with the problem that the computer turns on itself when power is applied. This is quite rare, but this problem cannot be ignored. Automatically turning on the computer when power is supplied can lead to catastrophic consequences for the computer, for example, the motherboard may burn out. There is also a possibility of losing valuable data on your hard drive. If you have this problem, it is recommended to create backups data until you solve it.

How does this problem manifest itself? When you plug in your computer, the power supply and motherboard automatically turn on, but the monitor doesn't light up until you press the power button on the case. Also during shutdown, you may see that the cooler and all computer hardware are turned off, but the indicator on the motherboard is still on.

This problem must be resolved as soon as possible before serious damage is caused to the computer hardware.

Reasons why the computer turns on by itself when power is applied

Faulty power supply. A faulty power supply could be the culprit behind this problem. You can test the performance of your power supply using a paper clip.
Problem with settingsBIOS. Check the BIOS settings on the motherboard and make sure the computer's startup options are set correctly. Next we will look at how to do this.
Faulty power button on the computer case. Shorting the wires to the power button in the computer case can cause the computer to turn on when power is applied.

Note: If when you turn on your computer you hear sound signals probably a problem with RAM or hard drive.

Solutions

1. Check the power supply using a paper clip. The video below shows how to do it correctly.

2. Enter BIOS mode on your computer. Next, open the tab “ Power", and in the parameter " AfterPowerFailure» select « StayOff" After that, go to the “ Exit", and select " ExitsavingChanges».

3. Check all the wires near the power button inside the computer case to make sure they are not shorted.

If the power supply, BIOS settings and power button on the computer case are fine, then most likely the problem is with 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. You should not put off solving this problem until later, otherwise more serious problems may arise, for example, the motherboard will burn out.

Recently they brought me a computer for diagnostics, which turns on itself when connected to a power outlet. There may be several reasons for this phenomenon - from simplest mistake in setting up the BIOS, 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 the need to press the “Power” button. For example, in my case, after much questioning, I found out that the day before the client’s grandson was sitting at the PC and doing something “in the blue table.” That is, some BIOS parameters were 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 being plugged into the power supply. It turns on and off in motherboard, namely in the “Power Configuration” or “Power Management” section. There should be a setting called "After AC Power Lost".

Also, depending on the board manufacturer and 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 computer’s reaction when power is connected to it and has several meanings:

— Stay Off(or simply Off) — the computer will remain turned off and will not react in any way;

— Power On(or simply On) — the computer will automatically turn on when 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 power supply appears will depend on the state of the computer at the time of the power outage. That is, if it was turned off, nothing will change, but if it was turned on, it will turn on again.

So, if you don’t want the PC to turn on when plugged in, set the value to “Stay Off”.

Reason 2: Hardware failure

Unfortunately, in some cases, the computer’s autostart when power appears indicates that the computer’s components have failed.

The power supply is broken

Often, on cheap Chinese power supplies, there are so-called “breakdowns”, in which the PC turns on independently from an electrical impulse, without pressing the “Power” button. If you have such a power supply, then I strongly recommend replacing it before it’s too late, otherwise the next stage may be a breakdown of the motherboard, and this is already a significant expense.

Motherboard failure

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 occur both on old motherboards due to swollen capacitors, and on new ones due to manufacturing defects.

P.S.: If surges and drops in the electrical network often occur in your home, then it is imperative to install a voltage stabilizer. Otherwise, even if you replace components due to a malfunction, after a short time the problem will repeat again and you will have to change the power supply or motherboard again.

Today there is a sufficient amount of software with which we can control the automatic turning on of the computer according to a schedule. But I want to note that automatically turning on the PC using programs is only possible when it is in “sleep” mode.

That is, a computer that is in “sleep mode,” as it would be easier to say, is already turned on. It just “wakes up” and doesn’t turn on.

It turns out (I was ashamed not to know this :)), you can configure the computer to automatically turn on according to a schedule and even when it is COMPLETELY OFF! Modern BIOSes that come with PC motherboards have settings to automatically turn on a switched off computer according to a schedule.

At the beginning of my acquaintance with computers (since 1995), such a setting in the BIOS could only be dreamed of. For what purposes you can use turning on the computer automatically is up to you to decide.

For example, from the most banal - using a PC as an alarm clock, turning it on to distribute or download torrents while you are away, servicing your computer, or even when you are at work or on a business trip, etc.

I note that the fourth computer I tested, purchased 6 years ago, did not yet have this feature. Let's now move directly to the BIOS settings.

How to enter the BIOS depends on the configuration of your motherboard, mainly by pressing the Delete or F2 key on the keyboard at the initial stage of booting the computer. You can see a hint on the required keys immediately when you turn on the PC.

AUTOMATICALLY TURNING ON 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 to the “Power On” position.

We activate (“Enabled”) the auto-on setting “RTC Alarm Power On”.

We select 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 PC turn-on time: “hour/minute/second” in “RTC Alarm Time”.

After completing the settings, press the F10 key or the “Save Changes and Exit” and “OK” item to save the settings and restart the PC.

BIOS American Megatrends Inc. V4.3, 10/21/2009. We need the “Power Management Setup” section, go to it.

Turn on the “Restore On AC Power Loss” setting to the “On” position.

Activate “Resume By RTC Alarm”.

We set the activation for every day or on a certain date of the month in the “Data” setting and hours/minutes/seconds in “HH:MM:SS”.

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.

Activate “Power On By RTC Alarm”.

Settings for daily activation at certain hours/minutes/seconds become available.

Or a specific date, hours/minutes/seconds.

If you no longer need to automatically turn on your computer on a schedule, simply disable (“Disabled”) the “Power On By RTC Alarm” setting.

Unfortunately, these are all the BIOS versions on which I was able to test the function of automatically turning on the computer. If you have a different basic input/output system (BIOS), then you will already know where to dig. And finally, I suggest you watch a short video

Greetings, my dear readers.

I'll tell you about one interesting feature: auto-turn on 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, just one click on the button is enough to start the activation process. But what to do when the PC needs to be started without human intervention?

Network voltage is a great reason to work on your computer

Knowledgeable specialists will give you a lot of examples when such a need may arise:

The computer is a server;
It is necessary to provide round-the-clock access to the information stored;
Always active software is used (video surveillance systems, employee time records);
The PC operates in remote access mode;

Simply put, that’s why it’s a computer, to perform the tasks assigned to it automatically and without human intervention.

But, unfortunately, force majeure circumstances may interfere with the process in the form of an emergency shutdown of energy supply. The blackout period may last indefinitely, so the reserve as an uninterruptible power supply may not be enough.

Therefore, it would not be bad if the computer could turn on itself as soon as the power supply is supplied with operating voltage. This feature, implemented at the software level, is available on modern PCs, and you can activate it by changing the BIOS settings of the motherboard.

Since there are several types of BIOSes, I will describe algorithms for setting auto-on for the most common ones. To begin with, let me remind you how to get to the BIOS settings menu: when you turn on the computer, you should press the Del, F2 keys several times (or others that the system itself will tell you).

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 means 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 analogue is also present in other BIOSes).

The Real American System

Now let's move on to the American Megatrends Incorporated BIOS, which is similar in many ways to ADWARD, but has certain differences.

Moreover, versions of the AMI system itself may differ from each other. But since we know exactly what we need to find, it won’t be difficult to do. And we are looking for the “Power On” (or simply “On”) mode for the “Restore on AC Power Loss” setting.

And so, depending on the release date of the AMI BIOS, 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 No. 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 for many more understandable (and in some versions it is even Russified). But we are now interested in the incomprehensible English version.

So, once you find yourself in such a BIOS, you need to activate the advanced mode: press the “Advanced Mode” key or just F7 (Here, just in case, look carefully to see if in “System language” there is an opportunity to change the language to your native one).

"Advanced" tab;
Section “APM” (penultimate point, don’t miss it);
Bah, all the familiar faces, our favorite (today) item « Restore on AC Power Loss"!
Of course, we set the “Power On” setting for it;

Just like that, in just a few clicks you can set your computer to turn on automatically when power appears. But in reality you will have to make more clicks. Do not forget to save the changes made to the system (sometimes you just need to press F10 in the BIOS).

If you come across BIOS versions that are not presented in this review, then I suggest studying 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 may notice that by activating the “Restore on AC Power Loss” mode, you have the opportunity to set the days and times when your computer turns on. But this option is used quite rarely.