There are several potential causes for a monitor to go blank. In most cases, the problem can be attributed to a hardware or software issue.
The most common cause of a blank monitor is a hardware problem. The most common culprits are a faulty video card, a failed internal component of the monitor, or a faulty cable connection. A faulty video card can be caused by a driver conflict or the card itself may have failed. To diagnose this problem, try connecting the monitor to a different computer or laptop to see if it still produces the same issue. If the issue remains, then it is likely that the hardware of the monitor is at fault.
If the hardware appears to be in working order, then the issue could be caused by a faulty internal component such as the power supply or on-board logic chip. If the power supply is not supplying adequate power to the monitor, then it will not display a picture. This can be checked with a multimeter. If the power supply is not outputting the correct voltage, it would need to be replaced.
Alternatively, the issue could also be a problem with the physical connection between the monitor and the computer. This can be checked by disconnecting the cable and reattaching it again securely. Insufficiently secured cables can cause intermittent issues.
Software problems can also lead to a blank monitor. This includes incorrect or outdated drivers, outdated video card firmware, or incompatible video modes. To diagnose this, it is important to make sure that all drivers are up to date, including both the video card and motherboard drivers. Additionally, try changing the display resolution or refresh rate. If the issue continues, then the issue may be a software conflict within the operating system. To troubleshoot this, boot into safe mode and check to see if the issue persists.
In some cases, the issue could be related to the monitor’s settings. Try resetting the contrast, brightness, and other settings. If this does not resolve the issue, then it could indicate a more serious hardware issue.
Finally, if the above methods do not resolve the issue, then the monitor may need to be serviced or replaced. If the monitor is still under warranty, then a service technician should be called to properly diagnose and fix the problem.
In summary, there can be a number of causes for a blank monitor, ranging from hardware to software issues. If the issue persists, then it is recommended to contact a service technician to diagnose and repair the problem.