Close the contacts on the motherboard to turn it on. How to turn on a computer without a button? Doing tricks
A fairly common problem is the lack of response when pressing the computer's power button. In other words, when you try to turn on the computer as usual by pressing the button, nothing happens. This article will describe the possible reasons for this computer behavior.
Causes
So, let's begin. Here is a list of possible reasons:
- No voltage in the electrical outlet;
- Damage or non-contact of the power wire coming from the outlet to the computer power supply;
- The power supply button is in the off state;
- Damage to the computer power button itself or its wires;
- Failure of the power supply;
- Motherboard failure.
The first thing to start diagnosing this malfunction is to make sure that there is voltage in the electrical outlet. It is not necessary to do this as a tester. It is enough to plug in some other electrical device and make sure that it works.
Next, you need to check whether the black power wire is securely plugged into the electrical outlet and the power supply, and also inspect it externally for damage and fractures, especially at the ends of both connectors. To do this, remove its end from the computer's power supply and insert it back.
The next step is to pay attention to the computer's power supply. To do this, look at the back of the system unit at the place where the power cable comes from the outlet.
If there is a button - a switch, then it should be on.
Power button on the power supply
After this, you need to try to start the computer without the power button.
Turn off the computer and remove the side cover of the system unit. Next, we look for the contact block where the power button, reboot button, and indicators for turning on and operating the hard drive are connected. It is usually located in the lower right corner of the board.
Location of the contact block on the motherboard of the computer power button
When we found her, we removed all contacts from her. To do this, pull them up by the wires, having previously written down or photographed their location.
Now we take a screwdriver, knife or other similar metal object and try to close the contacts with it, which are labeled as “PWR_BTN” or “WP+ WP-” or “PWR SW” by simply touching them with the screwdriver at the same time.
How to turn on a computer without a power button - we close the contacts with a screwdriver
If you cannot find these contacts by the inscriptions under them or you simply do not have inscriptions under them, then try to close all adjacent contacts in turn with a screwdriver.
If the computer still does not turn on, then the problem is not with the power button.
Now, in order to check the power supply, you need to try installing a known working one, borrowing it from friends or acquaintances, or test your power supply on another computer.
If the power supply turns out to be intact, then the only remaining reason will be a non-working motherboard, which in most cases will have to be replaced, unless the capacitors on it are simply swollen, which can be replaced.
This is what swollen capacitors on a motherboard look like
Any device is subject to physical wear and tear, as a result of which it may stop working. This also applies to desktop computers, with which problems constantly arise. Very often the power button in system units fails, without which it is very difficult to start the computer. So what should you do in a situation where you pressed the power button and nothing happened in response?
general information
Sometimes a situation arises in which it is impossible to turn on a desktop PC. In this case, there is power in the network, the LED on the system board lights up, which signals its operation, however, the device does not respond in any way to pressing the power button. Most likely this is due to its failure. So what to do in such a situation and is there any other way to start the computer?
Such a breakdown can be associated with a huge number of factors, some of which can be eliminated on your own, while others may require the help of professionals. This article will discuss the most common causes of failure, methods for eliminating them, as well as some ways to start a system unit without a power button.
Diagnostics
A system unit is a very complex device consisting of various components, each of which can fail. Therefore, if you encounter any problem, the first thing you should do is try to understand what the problem is. The system unit is powered by a power supply unit, which is very sensitive to voltage drops. Thus, troubleshooting should begin with it. To do this, you need to disconnect all power supply wires from the system board, optical drive, hard drive and graphics adapter. Next, using a paper clip, you need to close two contacts on the widest adapter, which is responsible for supplying power to the motherboard. In most power supply models, these contacts are green and black. If, after a short circuit, the cooling cooler of the power supply does not start, this indicates that the device has failed. If everything works, then most likely the problem is with the power button.
How to turn on a PC without a button?
If the start button on your system unit is broken, then do not despair, since the computer can be turned on without it. The power button is located on the front panel, which connects to the system board. The motherboard has special connectors for connecting the panel, which are located in its lower right corner and labeled Power Switch. When you find this connector, you need to disconnect all the wires from it, after which you need to close the two contacts labeled PWR SW using a screwdriver.
If after performing the steps described above the system unit starts, then the problem really lies in the power button. There are several ways to fix this problem:
- Completely replace the power button;
— connect the reset button to the power connectors;
— Take the computer to a service center for repair.
The best option would be to completely replace the worn-out button, since without it it will not be possible to operate the computer normally. After all, you will agree that it is not very convenient to climb into the system unit every time to turn on the PC. If you do not have the necessary experience, then it is better not to take risks, but to seek help from professionals.
Using the keyboard
The keyboard is one of the most effective devices that allows you to interact with the computer and use all its capabilities. In addition, not all users know that using this device you can not only turn off the PC, but also turn it on. However, it’s worth noting right away that only a keyboard with a PS/2 interface is suitable for inclusion. More modern models that use a USB connector to synchronize with the system unit will not allow you to achieve your plans.
If you have an input device with the required interface at your disposal, then to control the computer's power using it, you will need to configure hot keys. To do this, you can use both single keys and their combinations. For example, it could be a spacebar or Ctrl+Esc. After saving the changes made to the settings and restarting the computer, all changes will take effect.
For settings, you will need to enter the BIOS using a standard key, after which you need to go to the Power Management Setup tab, where you will need to set the default keyboard in the line for selecting a device to launch. This will solve the problem of turning on the computer when the power button is faulty, without replacing it.
Design features
The power button has a very fragile design, so it breaks down very often. If you bought a cheap Chinese-made system unit, then the power button may have an even shorter lifespan and fail much earlier. Therefore, when purchasing a ready-made desktop system or independently assembling a computer using components, you need to pay great attention to the quality of all elements and components of the PC, so as not to regret your choice later. Today, there are many brands on the computer components market that produce high-quality cases and power supplies, so there will be no problems with the choice.
Precautions for diagnosis and repair work
If you decide to look for a fault and repair the system unit yourself, without the help of a professional, then you must follow basic safety rules so as not only to avoid getting hurt yourself, but also to avoid causing even more harm to your computer. The main requirement when performing any work is to completely de-energize the system unit. To do this, you need to unplug the power cable. This must be done even if the power supply has a special button for de-energizing.
This simple rule will help you avoid many unpleasant situations. Of course, you won’t get an electric shock, but imagine what will happen to your fingers if the system unit starts up, and at that moment you accidentally put them into the cooling fan? Or you'll be unscrewing bolts and one of them will fall onto the motherboard and short out something, causing the motherboard or some other device to burn out.
In conclusion
So, if you have read the article to this point, it means not only that it has come to an end, but also that you now know how to identify a faulty computer power button, repair it, and also know how to start a PC without it buttons. Finally, it is worth noting that the article discussed only basic measures to eliminate this problem. There are several other ways to fix the problem with the power button, however, they require the user to have certain skills and experience working with electronics, so it will be quite difficult for novice users to cope with them. To never have problems with your computer, assemble your system unit exclusively from high-quality components.
Difficulty level: Easy
What you will need:
- Basic knowledge of English.
- Motherboard manual.
- Small screwdriver.
1 step
Turn off the computer's power. Remove the left side cover. Next you will see the hardware of your PC, for which you once paid a lot of money. At the bottom of the motherboard on the right, you will see connectors for connecting power wires, reboot wires and HDD indicators.
Step 2
In the vast majority of motherboards, these connectors consist of two rows of pins, usually 9 pins. Please note that each motherboard manufacturer has different pin layouts, so it would be better to look at the motherboard manual. The contact diagrams of the most common motherboards are shown in the figure (the contacts that need to be closed are indicated in red).
Step 3
Find the power cable (POWER two twisted wires) and carefully disconnect it from the motherboard. As a result of this you will see two pins. Connect the system unit to the network. Connect these two pins with a metal object, such as a small screwdriver. Don't be afraid, you won't get an electric shock, the voltage there is very low. After closing the contacts, the computer should start and boot. If this does not happen, then most likely you have closed the wrong contacts.
- Do not do this if the system unit is under warranty.
- Use this method only as a last resort; it is better to replace the case with a new one.
The skill of starting a power supply without a computer and motherboard can be useful not only to system administrators, but also to ordinary users. When problems arise with your PC, it is important to check the functionality of its individual parts. Any person can cope with this task. How to turn on the power supply?
How to turn on the power supply without a computer (without a motherboard)
Previously, there were power supplies (abbreviated as PSU) of the AT standard, which were launched directly. With modern ATX devices, such a trick will not work. To do this, you will need a small wire or a regular paper clip to close the contacts on the plug.
On the left is a 24-pin plug, on the right is an older 20-pin plug
Modern computers use the ATX standard. There are two types of connectors for it. The first, older one, has 20 contacts on the plug, the second - 24. To start the power supply, you need to know which contacts to close. Most often this is the green PS_ON pin and the black ground pin.
Note! In some “Chinese” versions of the power supply, the wire colors are mixed up, so it is better to familiarize yourself with the contact diagram (pinout) before starting work.
Step-by-step instruction
So, when you have become familiar with the wiring diagram, you can start starting.
Carefully remove the power supply from the system unit
Connect something to the power supply to create a load, for example, a hard drive
Carefully compare the pin layout on your plug and on the diagram
Make a jumper
Hello friends.
Your hardware refuses to start by pressing Power, but you urgently need access to its contents? Or do you just want to know the cause of the breakdown? Then this short article is for you. I'll tell you how to turn on your computer without a button.
Before we begin, I want to make a disclaimer:
You perform all actions at your own peril and risk, I am not responsible!
I hope, you understood me. So let's go.
Algorithm of actions
First of all, you need to disassemble the system unit and find certain wires:
- Disconnect your computer from the power supply.
- Unscrew the left panel of the case and look at the motherboard, because it is the “brain center” of your hardware.
- You need to find wires of different colors running from the front of the case to the motherboard.
- On each one it is usually written what he is responsible for. You need "Power". As a rule, these are two intertwined wires.
On most computers, the connectors include 9 pins. Of these, the last two, consisting of 4 contacts and located in a short row, are responsible for switching on. They can be signed as Power Switch (PW Switch), Power ON, On-Off. This is what we need.
Now let's get started:
- The computer should start. If this doesn't happen, try again - maybe you didn't clamp it enough.
If the power button is out of order, as a temporary measure you can replace it with a reset button (a chip from the Reset button).
For laptop owners
Attention! Do everything as carefully as possible. If you doubt yourself, it is better to delegate this task to a more competent person.
Disassembling the laptop case is somewhat more difficult. To avoid causing trouble, look at the instructions specifically for your model. Once you get to the back of the power button, follow these two easy steps:
- Disconnect it from the cable or the wire going to it.
- Using a screwdriver, close the contacts on it, while holding the insulated end.
If the problem was in the button, then the laptop should start. That did not happen? Most likely, the problem is in the cable: there may be kinks or damage on it. In this case, you have no choice but to change the entire assembly completely.
Be that as it may, if the button does not work, you need to install a new one as soon as possible. You won’t start the computer every time with a pen or a screwdriver :).
By the way, if you are not sure that you will be able to do this using the methods described above, it is better not to try; especially when the hardware is still under warranty. After all, after you take it apart, the coupon is canceled, and under warranty there is a chance to fix the breakdown for free.
Check out my blog more often. I'll find something to interest you.
