The monitor is the output part of a PC hardware feature which means its existence. Because only through the monitor can we observe the results of the work we do with the PC. For those of us who use a PC by relying on visualization, the position of the monitor is very important, without a monitor we cannot use a PC. In contrast to people who have visual disabilities (can’t see) who use a computer with sound reference, the monitor may not be a significant problem.
As with machines in general, monitors can also be damaged. Whether it’s damaged due to lack of maintenance, consumption that has been very long, or consumption that is not good enough. But in many cases, the absence of a photo displayed on the screen is not just a cause of damage to the monitor. There are many other triggers that cause loss of signal from the CPU to the monitor, so that the monitor cannot show the proper display.
Check the HDMI port
In addition to problematic cables, the HDMI port can also be problematic, apart from age, poor consumption can also damage it. Suppose you plug the HDMI cable into the port in a hurry and force it until it causes the pins on the port to bend.
If one of the pins is bent, the information flow process from the CPU to the monitor will not work properly. To check, you can look at the port body. Or if you want to be more confident, you can connect the CPU to another monitor, also connect the monitor to another CPU.
Check the Monitor cable
The monitor cable is the first thing you need to check, if the words ‘signal number detected’ appear on your PC monitor screen, instead of Windows or another OS that you installed. Old cables often become brittle and can break in several parts. (See also For LCD Projects, How to Get Rid of Shortcut Viruses)
To fix this, try using another HDMI cable that you are sure is in good condition. You can borrow it from a friend if you don’t have a spare cable. If the monitor display is good after changing the cable, return your friend’s cable then buy a new HDMI cable for your monitor.
If the monitor cable is not a problem, the HDMI port is also fine, try checking your PC’s VGA.
On a computer there are 2 types of VGA, on-board VGA which is directly installed on the motherboard or VGA add-on in the form of a removable VGA card. If your computer uses a VGA add-on, you can try installing another VGA to test it.
Dirty or damaged PC RAM can also cause loss of display on the monitor screen. Try removing the RAM and rinsing the pins using a pencil whitewash. After that put it back properly. Is there a change? If not, try borrowing another RAM that is in good condition, then try using it on your PC’s CPU. If indeed the RAM is damaged, replace the RAM so you can use your PC again.
The motherboard is the home where all the core components of the PC are installed. Problems that occur on the motherboard will greatly affect the performance of the PC system. All connected input and output features will not work properly if the motherboard encounters a problem. Included is the loss of signal from the CPU to the monitor screen.
A quality motherboard rarely experiences failure, except for wear and tear or consumption errors that cause short circuits, voltage shocks, or loose / broken circuits.
Before changing it you can first try to solve then clean the entire motherboard. Sometimes dust that accumulates on a motherboard that has been used for a long time can cause the motherboard to not work properly. By cleaning it can overcome cases.
Check the Power Voltage
Less than normal voltage can cause the energy supplied by the power supply to other components, such as the hard disk, to be abnormal too. When the energy required by the hard disk is not fulfilled / lacking, the hard disk will not be accessible properly. One of them can cause signal transmission from the CPU to the monitor screen to falter.
To fix this, you can try turning on the computer without a hard drive first. Check if the BIOS display appears on the screen. If it occurs, the error could indeed be on a low energy hard drive. You can reinstall the hard disk while also trying to get the energy that the PC receives normally. You can use a stabilizer or UPS.
Processors don’t break very often, but that doesn’t mean they can’t. If the processor has a problem, not only will the monitor not get a signal, but the computer will not be able to start at all. Or live for a while but die again. Universal cases of processors are usually caused by overheating. Even though the processor has a self-shutdown system when it encounters overheating, forced consumption can still cause damage. Also read the trigger for the destruction of the processor.
First, check the processor fan and heatsink. Is the fan running normally? Also rinse the dust attached so that the cooling process goes well. The characteristics of a dead processor are easy to spot, if the processor is always cold even though other components are hot when turned on, then the processor is no longer working.
Thus the discussion overrides the method of overcoming the PC signal number. First, you must check the feasibility of the monitor cable, and the HDMI port on your PC features. Apart from that, checking VGA, RAM, Processor and Motherboard also needs to be tried. Because the case with these components can cause disruption of signal transmission from the CPU to the monitor screen.