There are a few possible causes for this issue. First, check to make sure the power cable is securely plugged in and the outlet is working. If those are not the issue, it could be a problem with the monitor's internal power supply or a faulty power button.
This could be caused by a loose connection between the monitor and the computer, a faulty VGA or HDMI cable, or a problem with the graphics card. Try reseating the cables and checking the graphics card for any issues.
Flickering can be caused by a few different things, such as a loose cable connection, outdated or incompatible graphics drivers, or a faulty backlight. Try updating your graphics drivers and checking the cable connections. If the issue persists, it may be a problem with the monitor's hardware.
This could be due to a few different things. First, check the display settings on your computer to make sure they are set correctly for your monitor. If that doesn't fix the issue, try adjusting the monitor's brightness and contrast settings. If the problem persists, it could be a sign of a faulty monitor or graphics card.
Unfortunately, a cracked or broken screen is not something that can be easily fixed. It is best to replace the monitor if this happens. To prevent this issue, make sure to handle the monitor with care and avoid placing heavy objects on top of it.