Computer needs to be cleaned of dust.
The computer turns on, but there is no image on the monitor in 90% of cases it is because he urgently needs to clean the computer from dust. It is also advisable to change the thermal paste and lubricate the fans, if necessary. RAM is the first thing that stops working, followed by the entire PC. Sometimes computer may even shut down or freeze because of overheat because dust is clogged in the radiator and prevents proper cooling of the central processor. It naturally begins to overheat and as soon as the temperature reaches a maximum, the processor gives the command to shut down immediately.
When cleaning the computer from dust, you should pull out all the PC components from their slots and blow them well. A can of compressed air is a good choice for this procedure. (can be purchased at any computer store)
If after cleaning the computer switches on but still no display, then read the article further.
The monitor doesn’t turn on at computer startup. what’s wrong??
Before proceeding to the main steps, you need to make sure that the lack of performance lies exactly in the monitor. In particular you should perform the following manipulations:
- Switch off your PC completely. Wait until the characteristic noises stop.
- Press the button again to start the computer. If the sounds appear, indicators are activated, then the source of the problem is really in the screen.
So, let’s analyze, perhaps, the most common case. bad contacts. Consequently, check the quality of connection of all wires not only to the motherboard and graphics card, but also those products that are attached to the back of the monitor. Other than that, you can try these steps:
- DVI connector owners can change the connector to blue. If you still have no result, connect the connection to the motherboard itself. If it starts to work, it will indicate that the video card is burned out.
- The most lethal outcome is if the monitor has burned out. You can try to take it apart.
WARNING. For people who do not understand how to do it at all, it is recommended to avoid these machinations and contact a professional.
HP Laptop Starts but No Display | Black Screen | @HPSupport
Strange as it may sound, but in 9 out of 10 cases the screen has nothing to do with the failure. It continues to work, the power button may blink, as if the device is in standby mode. But the image does not show on the display, instead you see the inscription: “No Signal”. This indicates that no data is being received from the system unit.
What to do first? Be sure to check the connection. Perhaps one of the ends of the VGA / DVI / HDMI cable fell out of the socket. Or maybe someone intentionally decided to harm you and pulled the cord. Alas, this also happens.
Listed below are other common reasons why the monitor does not turn on when you start your computer:
- Damaged PC power supply (it does not work at all or its voltage is insufficient to supply the system needs);
- Faulty RAM;
- Failed video adapter (also possible clogged contacts);
- “The chipset is dead. Rare and very unfortunate situation;
- The problem is really in the monitor.
That’s all well and good, but I’m sure you’re more interested in the specific steps for fixing the defect. Here it is necessary to show special attention to detail, because it is necessary to identify the source. And any signals from the computer will help. Now let’s move on to a detailed breakdown of the solutions.
Why the monitor does not turn on when the computer is switched on
Sometimes the users of personal computers and laptops have problems with the fact that after turning on the power supply to the PC the monitor does not automatically start. This problem can have quite a number of causes, which we will try to describe below in detail, focusing on possible methods of repair.
Turning the monitor on and checking the video input
We have checked the power connection. Now turning the monitor on. At this step we need to check its functionality to rule out this cause. Press the power button. It should light up and you should see some writing on the screen. If both the button and the monitor itself don’t turn on, you can once again verify that the monitor is plugged in. You can try switching the monitor to a different outlet.
NOTE! If the monitor does not react to anything at all, there are two options. Either the monitor itself is burned out or there is a problem with the power supply unit. check that the plastic on it is not bloated or corroded. There may be a problem with the cable. if possible replace it with a new one.
If the monitor works and turned on. look, what the inscription appears at the beginning. If you see “No Signal” try switching inputs on your monitor. There is a separate button for this, which is located next to the “On/Off” button (may be called “Sources”).
Why do we click on it?? As a rule the monitor has several inputs to which the computer is connected. As you have already understood, usually only one input is used, so it is necessary to find it. If you can not find the input, go to the next step.
The monitor does not turn on when the computer starts up. how to bring your electronic friend back to life
The computer screen may not turn on for a variety of reasons. And you can determine them by the stages of computer booting. For example, if the loading stops on the stage of switching on the screen, that is, it does not react to the power supply at all, it means that either the video card is seriously damaged, or it is connected incorrectly. If the boot process reaches the stage of the operating system, but then for some reason the display turns off, then there may be drivers, and the video card, and the operating system to blame. Failures in one of them can cause screen failures as well. Below we’ll take a closer look at why a monitor can malfunction and what to do if it doesn’t work.
Unplugging External Devices
To solve the problem, disconnect all external devices and restart your computer. First of all it concerns such devices as a second monitor, projector or TV. If the computer or laptop displays the boot process, then one of the external devices was causing the problem. If the error disappeared, then connect the external devices one by one until you get a black screen again. Then remove the last device you plugged in and make sure the monitor works again.
Do not use the problematic device until you get an answer to the current problem from the manufacturer.
BIOS does not start/hangs
A blinking cursor on the screen when the PC starts up, or a hang-up during BIOS initialization may indicate various problems with the hardware. First check that all connectors (for example, CPU cooler) are securely attached to the motherboard and that all coolers are functional. Replace defective ones if necessary. The motherboard speaker sometimes gives important information in the form of beeps. The meaning of each beep is explained in the motherboard user’s manual. However, it is necessary that this small speaker is properly connected to the “Speaker” connector of the motherboard (make sure of this or use a special POST card for diagnostics).
The above described symptoms may also indicate incorrect BIOS Setup settings, which can easily be resolved by factory reset. Turn off your computer, unplug it, open the case and find the Clear CMOS jumper on the motherboard, which of the three pins usually closes first and second. Change its position for ten seconds so that it closes the second and third contacts, then return it to its original position.
Black screen on windows startup FIX
After that, the motherboard, having “forgotten” all the UEFI settings, should start again. If you don’t see this jumper, remove the motherboard battery for ten seconds, and then put it back. If problems occur every time you unplug the computer, replace the battery.
The next suspect is the RAM: check each module individually (if only one is installed, try another slot) and replace the faulty one if necessary.
Then disconnect all hardware that isn’t essential for PC operation from USB, PCIe, and other computer connectors. If it starts after that, gradually plug everything back in. and try until you find the culprit.
If nothing helps, it is likely that the motherboard and/or CPU is damaged and you need to get ready to buy new devices.
Before you start reading this article, make sure the surge protector is on. If there is no power, you will never see any image on the screen. It’s possible that someone in the house has turned the monitor off through a button, or maybe you did it on purpose. Check if everything is OK with this.
So what do you need to do first, when the monitor does not turn on when you start your computer? Some monitors, like system boxes, have an on button. Usually this is on the back of the monitor but you can also find it on the side. To turn the monitor on, you must turn it to the “On” position (1). Please refer to the picture below for clarification:
To determine if the monitor is on, look at the front of the monitor. On the bottom there are usually indicators by which you can tell if the monitor is receiving power.
The very first common problem is bad contacts. And this nonsense can be as in the place of connection of wires to the motherboard, the back of the system unit, also bad contact between the graphics card and the motherboard and most banal, when a bad contact on the back of the monitor. In general, you need to check both ends of the wires, namely the wire which transmits the picture to the screen and the power wire from the network.
There may be another pitfall here, the type of signal transmitted to the monitor. In modern graphics cards there are two built in connectors, which can be used to connect the monitor: white (DVI) and blue (VGA). The latest kind of connector, which can be found in the latest monitors is HDMI and when connecting it it is hard to make a mistake.
If you have a DVI connection, try changing it to blue and vice versa. Did not help? Then look for the monitor connector on the motherboard.
️ The Monitor Won’t Turn On When PC Starts
It will be there in the case where the above board has a built-in video adapter. Connected? Works? Then the problem is in the video card, namely in the settings or the worst thing you have it burned out. You can also connect another monitor by disconnecting it from another computer, you can borrow one from a neighbor for a couple of minutes if you don’t have a second home computer. When turning on another monitor, turn off your computer, disconnect your monitor and connect another one, then turn on your computer.