01

Confirm the monitor itself is working

Rule out the display before looking at the PC.

  • Check that the monitor's power light is on
  • Try connecting a different device (laptop or console) to the same screen using the same cable
  • If the other device also shows no image, the monitor itself may be faulty
02

Check the input source on the monitor

Monitors often default to the wrong input after being moved or restarted.

  • Press the Input or Source button on the monitor
  • Cycle through the available inputs
  • Make sure it matches the port your cable is plugged into (HDMI, DisplayPort, VGA)
03

Check the cables

A loose or faulty cable is one of the most common causes of a blank screen.

  • Unplug the display cable at both ends and firmly reconnect
  • Try a different cable if you have one available
  • Try a different port on the graphics card or motherboard
04

Check GPU vs motherboard output

If your PC has a dedicated graphics card, the cable must go into that, not the motherboard.

  • If you have a graphics card, plug into the GPU ports (usually lower on the back of the PC)
  • If there is no graphics card, use the ports on the motherboard directly
  • Having both connected can sometimes cause confusion, use only one
05

Perform a power reset

Residual charge in the system can sometimes prevent a proper boot.

  • Turn off the PC fully
  • Unplug the power cable from the wall
  • Hold the power button for 10–15 seconds
  • Plug back in and turn on
06

Reseat the RAM

This is one of the most effective fixes and very commonly overlooked.

  • Turn off the PC and unplug it
  • Open the case and locate the RAM sticks
  • Press the clips on each end to release each stick
  • Remove the RAM, then firmly reinsert each stick until it clicks into place
07

Listen for beep codes

Some motherboards emit beep patterns that indicate specific hardware faults.

  • Turn the PC on with the case open and listen carefully
  • No RAM or failed RAM often results in a beeping pattern
  • If you hear beeps, note the pattern, it can help identify the fault
08

Check for signs of partial boot

Assess how far the system is actually getting.

  • Are the fans spinning?
  • Do the keyboard lights come on?
  • Is there USB power (check if a phone charges when plugged in)?
  • No power to USB at all usually points to a deeper fault

If All Checks Fail

If the PC still shows no display after working through all of the above, the issue is likely hardware-related:

  • RAM failure one or both sticks may be dead
  • GPU fault the graphics card may have failed
  • Motherboard issue less common, but possible

If your PC powers on but still shows no display after these steps, it typically requires proper component testing to pinpoint the fault. Trying to diagnose it through trial and error can quickly become time consuming. If you're in Johannesburg or Gauteng and you'd prefer a clear answer without the guesswork, feel free to reach out.

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