![]() If your monitor and video card work with another computer, your motherboard probably has an issue. If it does not work in the other computer, the video card is likely bad and needs to be replaced. Try removing the video card from the affected computer and installing it in another computer. If your monitor works on another computer, the video card may be bad. Disconnect your monitor and connect it to another computer While it may be possible to have the monitor serviced, it is often cheaper and easier to purchase a new one. If another monitor works on your computer, it's safe to assume the non-working monitor is bad and should be replaced. Borrow someone else's computer monitor and connect it to your computer The best method of determining this is to try the suggestions below. If you followed the recommendations above and still no picture appears, your computer may have a bad monitor, video card (graphics card), or motherboard. If you hear beeping when you turn on your computer or see strange lights, run through the POST troubleshooting steps to determine the issue. If the computer doesn't pass POST (power-on self-test), it won't turn on or be responsive, and your monitor remains black. Once the computer is off, wait a few seconds and then turn the computer back on by pressing the power button. You can tell a computer is off when it has no lights and the fans are not spinning. To reboot a computer when you cannot see anything, press and hold the power button until the computer turns off. If the computer was on when the screen went black, something may have happened that requires the computer to be reboot.
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