Fix: No Signals on Monitor

One of the most famous computer related issues is when the monitor fails to give a display. Despite the beeping sounds and flickering lights on your CPU, you aren’t able to get any signals into your monitor. This can be caused by a variety of reasons ranging from chronic motherboard malfunctioning to a simple RAM displacement or even something related to your power cables.

We have compiled a couple of methods that will most probably solve the issue for you if you are facing it currently and have tried most of the hardware related suggestions available online without any results. Read on:

no signal monitor

Method 1: Power Cycle

As a first step, you need to ensure that all the switches on the switchboard (the ones related to the cables used for your computer) are turned off before you move ahead with the steps.

Now, disconnect all the cables (including the power supply) from your CPU and your monitor.

  1. Press the power button and keep holding it for around 1 minute.
  2. Reconnect all the cables now.
  3. Press the power button again.

Your PC should now turn on with the signals going in to the monitor and you getting the display!

Method 2: Remove the CMOS Battery

The second method that we will talk about involves the removal and consequent reinsertion of the CMOS battery. CMOS or Complimentary Metal-oxide semiconductor is a battery powered chip present on the motherboard meant to store some valuable information. When you remove/disable the CMOS battery and keep it out/disabled of the motherboard for some time, the residual energy contained within the circuitry gets drained and normally this is able to fix boot related issues. Extra care is needed to be taken to ensure that no damage is done to both the motherboard and the battery.

Turn the computer completely off and remove all the power cables.

Open your system’s casing. You might need a screw driver to remove any screws.

Locate your motherboard and find the CMOS jumpers on it. They are normally labelled something like JCMOS or CMOS

When you find the pins, observe that there is a plastic cap that shorts 2 of the 3 pins present on the jumper. All you have to do is to move the cap from the first two pins to the last two

Wait for a few seconds (Approximately 15).

Return the plastic cap to its normal position and try to reboot.

Now in some cases, the motherboards (like on most laptops and some desktops) don’t have concrete CMOS jumpers as the ones mentioned above. If that’s the case with you too, then try out these steps instead:

Open the computer case and find the CMOS battery on the motherboard.

Remove the battery and leave it out for around 20 seconds.

Hold down the power button and keep it pressed for around 2 minutes with the computer unplugged and no batteries connected so that the energy residue inside the machine’s circuitry gets flushed out.

Put the batteries back in and power the machine up.

Still didn’t work for you? It was probably not a CMOS related issue. Keep trying: 

Method 3: Check and Reseat the RAM

Another reason for the PC being unable to boot can be a faulty/slightly-displaced-from-position RAM. A RAM is a volatile memory stored on a stick that is vital for a computer to boot.

Open the computer case and find the RAM.

If you have one RAM stick then take it out and follow these steps:

Clean the RAM while being extra delicate and careful. Sometimes the dust on the RAM or the RAM slot can cause the problem.

Also clean the RAM slot where the RAM gets connected.

Reconnect the RAM and ensure that the stick has been seated properly.

If you have multiple RAM sticks:

Repeat the above step for each of the memory stick and boot with one memory stick inserted at a time.

If you are unable to boot with a stick, then that’s the faulty one and you will have to replace it.

Method 4: Diagnosing Video/GPU Card Related Issues

Another reason for this problem to occur can be the video card malfunctioning. If you have a dedicated GPU installed on your computer, then follow these steps:

Open the computer case.

Remove the video card from the motherboard.

Now try rebooting with the on-board VGA card (Should occur by default).

If however you don’t have a dedicated video card and are still facing this issue (and nothing else has worked yet for you) then there is a possibility that the on-board VGA card is malfunctioning. To try this out, you will need to get another video card which you can plug in your PCI-E slot. Follow these steps:

Open the computer case.

Connect the dedicated video card to the PCI-E slot and reboot.

If the PC reboots then the issue was with the on-board video card and you will have to boot with the dedicated video card from now on.

Method 5: Faulty Motherboard

If you are reading this, then you have tried all the mentioned methods without any positive results. This can lead you to conclude that your motherboard is the faulty piece of the puzzle. Sadly, you will have to get it replaced. However, before you go out and buy a motherboard for yourself, we recommend consulting a hardware expert and seeing if they can diagnose the issue better than you. If they deduce the same conclusion then you can get the motherboard replaced.

Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

Fix: No Signals on Monitor

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