How to handle when the computer is on but the screen does not display

The computer screen not turning on is an error that you have encountered many times when using a PC or laptop. This error is quite frustrating for those who do not have experience handling it or are not familiar with technology.

This situation occurs when you turn on the power button to start the computer system but the screen does not display any information. It is just black or blue and you cannot perform any other operations.

Reasons why the computer screen does not display

When encountering this computer error, the first thing users need to do is to determine the exact cause of the error to apply the most appropriate and effective solution. The causes of the error of the computer turning on but not displaying on the screen are quite diverse.

Computer screen not displaying is a very common error when using PC or laptop. (Illustration photo).

1. The computer does not turn on the screen, possibly because the video card is damaged, even though the computer case is still running normally.
2. The laptop's power light is on but the screen is not on. The cause is that the computer's RAM is loose, causing peripheral devices such as the screen, keyboard, and mouse to not receive the operating signal even though the computer's signal light is still on.
3. Due to the broken cable connecting the computer screen or the connection port from the CPU to the screen is loose or damaged, resulting in no signal being received.

Because the computer monitor power cord is broken or the user has not turned on the monitor.

1. Therefore, you need to check the computer power cord and see if the screen is turned on.
2. Because the cable connecting the keyboard to the screen is damaged, the screen cannot receive and transmit signals.
3. The error of the computer turning on but not displaying on the screen can also occur because the computer is having an error of continuously restarting the screen.

How to fix computer screen not showing effectively

After you have determined the cause of the laptop not turning on the screen, users need to find a way to fix the error through some of the following suggestions:

Restart and check the screen

First, try restarting your computer. Sometimes this is just a temporary glitch that can be fixed by restarting. To do this, simply press the reset button on your computer case (usually next to the power button).

Next, check that the monitor is powered on and properly connected to your computer. The monitor should have a power indicator light and display a logo or message when it is connected. If restarting and testing the monitor doesn't fix the problem, move on to the next step.

Reset CMOS

CMOS (Complementary Metal-Oxide Semiconductor) is the chip that stores your computer's BIOS/UEFI settings. Resetting the CMOS can help fix the error if it was caused by incorrect settings.

To reset the CMOS, find a CMOS reset switch or jumper on the computer's motherboard and connect it. The location of this switch or jumper is usually noted in the motherboard's manual. If you can't find either of these locations, remove the CMOS battery from the motherboard for a few minutes. Then, reinsert the battery and start the computer.

Remove unnecessary devices

Unplug all unnecessary peripherals from your computer, including external hard drives, USB drives, printers, and scanners. Next, remove all expansion cards such as network cards, sound cards, graphics cards, etc., leaving only the keyboard, mouse, and monitor connected to your computer.

Once you have detached the devices from your computer, restart and check to see if the error is resolved.

Check RAM

RAM failure can cause a variety of problems for your computer, including not being able to boot.

To test your RAM, try replacing it with another stick of RAM. If you don't have another stick of RAM, try removing one stick of RAM from your computer at a time and restarting after each removal (if your computer uses more than one stick of RAM).

If the computer boots normally when a particular stick of RAM is removed, then that stick of RAM may be faulty. Try cleaning the RAM slot and copper contacts, then try booting again.

CPU Test

In addition to RAM, CPU is also a component that can cause the computer to not boot.

To test the CPU, try removing the RAM from the computer and restarting it. If the computer displays an error code or beeps, the CPU is working properly. If not, the CPU may be faulty.

The computer is on but the screen does not display can be caused by many different reasons, from cable connection, power supply, hardware to software. Hopefully with the above instructions, you can fix this problem yourself quickly and effectively. If after trying all the above methods the problem is still not resolved, contact a professional technician for support.