Fix Desktop Display Issue

Fix Desktop display Issues with some simple steps

 Today morning “Powered ON” my desktop computer. But no response in monitor, it keep showing black screen. What to do? How will I play games? Did you worried and struck here? Before calling technician try these simple “TechAdminBlog” tips. It may save you few rupees also make your system available instantly.

Be cautious that you are trying these steps on your own risk. Keep below guidelines in mind.

  • Turn off main power switch and must unplug the power cable before open CPU cover and before touch any hardware parts.

  • While touching any CPU components make sure you are connected to earth by keeping your foot touched to earth. This to avoid ESD damage to electronic devices.

Identify source of problem

We have to drill down from monitor to inner parts of CPU. I will guide you through the step by step instructions. Wish you all the best.

Power source

  1. Turn on main power switch.

  2. All the monitors comes with main power LED indicator. Mostly it will be green in color. If it glows we could say no problem in monitor power input section.

Confirm monitor functionality

  1. All the monitors comes with main power LED indicator. Mostly it will be green in color. If it glows we could say no problem in monitor power input section.

  2. Observe monitor screen, It should say warning message like “No signal Input” otherwise some monitor will show like “No input detected, check cable”. If so then your monitor should be ok. Proceed with troubleshooting CPU.

  3. But your screen does not shows anything (no signal message) and either power LED glows or does not glows it is a sign of problematic monitor. You must contact hardware technician for monitor repair.

Troubleshooting CPU

Power on the system by pressing power switch in CPU.

Diagnose RAM fault

  1. If CPU power LED glows then we confirm our system powered on, hence power input and power cord is fine.

  2. Did you observe any long beep sound inside CPU? If yes it may be because of dirty RAM.

  3. Turn of the power. Unplug the power cable. Open CPU side cover. Pull out the RAM from slot by pressing two side locks.  Then clean the slot and RAM with brush. Put the RAM back in the slot and press gently you can see it firmly sit and side lock will get locked automatically.

  4. Plug in the power cable and turn on the CPU. If you are not hearing beep sound and still system not coming up proceed with next troubleshooting step.

  5. Still If system continuous to produce beep sound then retry the same steps (RAM cleaning) once again.

  6. Don’t find any improvement? Then your RAM might be the faulty. If your system has more than one RAM follow next step to identify which faultier one.

  7. Remove all the RAM from system and place only one RAM. Then try powering on. Same way ensure each single RAM tested with different slot. Very rare scenario all the RAM’s go faulty.

  8. You can work with your system if it working fine with any one RAM. Else if you feel your system too slow then replace a RAM with new one.  But make sure you are buying same type (DDR1, DDR2, and DDR3) and speed. It can be done by yourself.

Fixing BIOS issue

  1. Unplug the power cable and open side cover. Remove the CMOS battery and wait for five minutes. Place back the CMOS battery as it is. Now try powering on the CPU.

  2. Observe keyboard carefully, after powering on CPU all three keyboard LED’s blink once which means our system motherboard in the phase of initialization. You will see the POST (Power On Self-Test) page in screen.

  3. If display struck at logo page it is the sign of faulty BIOS or motherboard. Please contact hardware vendor to fix it.

  4. Otherwise if system shows blank screen after displaying logo it might be the sign of corrupted operating system or Motherboard issue. Try OS loading procedure and confirm it.

Check VGA cable

  1. Turn on CPU. Still if there is no beep and no display. Press and release “NUM LOCK” button for few times. If the NUM Lock LED responds to your keyboard move then our CPU ready and might be sending display signals to monitor.

  2. Display input signals will transferred from CPU to Monitor via VGA cable. One end of cable consists D-type male connector and another end has D-type female connector. The cable will be black in color but both side connecter will be blue.

  3. Try remove and fix the cable firmly. Still if you don’t see display there might be problem with VGA cable. If possible get working VGA cable from some of your friend and check with that.


Hope your display issue would get fixed at any of above mentioned steps. If so feel great to help you. Incase still you unable to bring back the image on your screen. Seems something wrong with hardware and it needs to be shown to hardware technician.

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