No display or black screen on a computer monitor
If your monitor initially works and then goes blank when Windows starts to load, see our page on how to resolve an issue related to distorted video after increasing resolution in Windows.
If you have a laptop, see our laptop screen is black page.
Monitor is not on
It may seem obvious, but make sure the monitor is turned on. If you do not see a power LED (blue, green, or orange light) on the front or bottom of the monitor, press the power button until it comes on. If no light comes on after several attempts, proceed to the next section.
Computer is asleep
If you stepped away from the computer for a bit and returned to a black screen, it is likely that the computer is asleep. Try moving your mouse, clicking the mouse buttons, or pressing any key (e.g., spacebar) to wake it up. If none of those actions work, press the power button.
Loose or improper connections
See our how to connect a monitor page for help with installing a new monitor.
Check the data cable
Check the power cable
If the data cable is plugged in, make sure the monitor is getting power by verifying that is a light (blue, green, or orange) on the front or bottom of the monitor's bezel.
If you see no lights on the monitor, make sure it is connected to a working wall outlet. If the power cord is removable from the back of the monitor, try replacing it with another power cable. If you still cannot turn on the monitor after trying another wall outlet and cable, the monitor is broken and should be replaced.
Check the LED status
If the monitor status light is orange or flashing, make sure the monitor is not in "suspend" mode, by moving the mouse or pressing a key on the keyboard. If this does not help, reconnect the data cable to the computer and back of the monitor, and then restart your computer.
Try a different cable
Turn up the brightness and contrast
If the computer doesn't pass POST, it won't turn on and your monitor will remain black. If you hear beeping when you turn on your computer, run through the POST troubleshooting steps to determine the issue.
If you have followed the recommendations above and still have the same issue, your computer may have either a bad monitor, video card, or motherboard. The best method of determining this is to try the suggestions below.
Borrow someone else's computer a computer monitor and connect it to your computer
If another monitor works on your computer, it is safe to assume that your monitor is bad and should be replaced. While it may be possible to have the monitor serviced, it is often cheaper and easier to purchase a new one.
Disconnect your monitor and connect it to another computer
If your monitor works on another computer, it is possible that your video card is bad. Try removing video card from the affected computer and installing it in another computer. If it does not work in the other computer, the video card is most likely bad and needs to be replaced.
If your monitor and video card work with another computer, your motherboard probably has an issue. You can attempt to troubleshoot motherboard problems using the link below. If you determine the motherboard is bad, or you cannot successfully run any tests, we suggest replacing the motherboard to fix the display problem.