Computer ON but no display solution

Computer on but no display solution

The most frequent reason why a computer “won’t turn on” is when it really powers on but the monitor is black. Nothing appears on your screen at all, despite the fact that you can see lights on the computer casing, probably hear fans running inside, and possibly even hear sounds.

Follow these Steps:

  1. Test your monitor. Make sure your monitor is functioning properly before starting more difficult and time-consuming troubleshooting with the rest of your computer.

Turn the monitor on and off when it’s not connected to your computer. You can tell the display is powered and equipped to display content if it displays any type of diagnostic information.

  1. Check to see if your computer has fully restarted and is starting up after being totally switched off. If you need assistance, look up how to restart your computer.

It’s possible for a computer to appear to “not be on” when, in reality, it’s merely having trouble exiting Windows’ Standby/Sleep or Hibernate power-saving modes.

  • Holding down the power button for three to five seconds will shut down your computer when it is in power-saving mode.
  • Turn on your computer and check to see if it boots normally once the power has been turned off entirely.
  1. If you’re fortunate enough to receive a beep code, investigate what is causing it.

You can find out exactly where to look for the reason behind your computer going off simply by looking at the beep code.

  1. Remove the CMOS. Your motherboard’s BIOS settings can be reset to their factory default values by clearing the BIOS memory. Your computer might not fully boot up due to a BIOS setting issue.
  • If erasing the CMOS does resolve your issue, ensure that any BIOS modifications you make are carried out one at a time so that, in the event that the problem reappears, you will know which change was to blame.
  1. Make sure that the power supply voltage switch is configured properly. Your computer cannot fully switch on if the power supply’s input voltage is incorrect.

Your computer may not turn on at all if this switch is malfunctioning, but it’s also possible that the power supply voltage is off, which would prevent your computer from starting up properly.

  1. Reinstall everything that can be found on your computer.

Reseating is frequently a “magic” solution to issues like this one because it will reestablish all of the connections inside your machine.

Try to see if your computer displays anything on the screen after replacing the following components:

  • Update the memory modules.
  • Replacing any expansion cards
  • All internal data and power cords should be reinstalled.
  1. Check your computer for indications of electrical shorts. If you do, you must look into the reasons behind such electrical shorts.

Check your power source. The power supply may be operating adequately even when your computer’s fans and lights are on. More often than any other piece of hardware, the PSU is to blame for a computer’s components working only occasionally or selectively.

If your power supply fails any tests you run, replace it right away.

  • If you replace the power supply, wait 5 to 10 minutes before turning on your computer afterward. This delay gives the CMOS battery, which may have been discharged, some time to recharge.
  • Do not disregard the power supply test because you believe the issue cannot be with the PSU because “things are getting power.” Power supplies can function to varied degrees; any that do not must be replaced.
  1. Start your PC solely with the minimum required hardware. The idea is to get rid of as much hardware as you can while still allowing your PC to turn on.

Disconnect peripherals, such as USB-connected storage devices, that are not required for your computer to function properly.

  • With only the necessary hardware installed, if your computer boots up without issue, move on to Step 9.
  • Continue to Step 10 if your computer is still not showing anything on your monitor.
  1. One component of the hardware you removed in Step 8 should be reinstalled at a time, with testing occurring after each installation.

Only the needed hardware was installed when your computer was turned on; therefore, those parts must function properly. This indicates that your PC won’t switch on properly because you removed a piece of hardware.

You’ll finally identify the problematic hardware by reinstalling each piece of equipment on your computer and testing it each time. After locating the flawed hardware, replace it.

  1. Using a Power On Self Test card, you can examine your computer’s hardware. With everything but vital computer hardware installed, if your PC still isn’t showing information on your monitor, a POST card will help you figure out which piece of extra hardware is keeping your computer from turning on fully.
  • Skip to Step 11 if you don’t have a POST card and don’t want to buy one.
  1. One component at a time, replace each necessary piece of hardware in your computer with a spare, working piece of hardware that is identical or comparable. This will help you identify the problematic piece of hardware. After replacing hardware, test to identify the problematic part.
  2. You are left unsure of which crucial piece of your PC hardware is broken if you don’t have a POST card or extra parts to change in and out. In these circumstances, your only real choice is to rely on the assistance of people or businesses that do provide these resources.


There are numerous reasons why an image on your computer monitor cannot be seen while it is operating. Some of them are really harmless. Others are significantly more serious and challenging to fix. Working through the problems in this article will either help you identify your issue or show you that you require assistance in getting your computer fixed.

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