Troubleshooting Desktop Computer

Upon Turn on Computer Always Beeping and No Display

Have you encounter upon turning on the computer unit, it only beeps and no display in your monitor screen. This kind of error is repairable at all time without cost. The beep codes depends what devices are connected inside your system unit ( some non techie person call it a CPU), is the computer has separate graphics card or it is using a built-in graphics comes with motherboard.

If this error happen take note in your mine; the power supply, motherboard and processor are most likely working. You have to listen first what kind of beep you hear and go directly where the problem is.

Common motherboard beeps and its equivalent error 

  • 1 long beep and three (3) short beeps – Video Card Error
    Video card loose contact or defective –  try to reseat the graphics card from PCI-express slot and if you have an older PC just reset the graphics card in Accelerated Graphics Port (AGP). If the motherboard has onboard vga try to connect the vga cable into it and see if the PC boots up. Some motherboard model need to reset the CMOS settings in order to shift the Display from PCI-Express / AGP Video Card to its built-in vga.
  • Long Continuous beep (It never stop until you turn off the computer) –  Memory Error
    Memory Loose Contact or Defective Memory – Remove the memory from its slot, and clean the memory including the memory slot. If it still doesn’t work try to insert to another slot or try another memory.
    Note: Avoid inserting memory in reverse position.
  • Short Continuous beep (It never stop until you turn off the computer) –  Memory Error
    Replace Memory – but try to check the memory in another computer.


Unusual motherboard beeps and its equivalent error

  • Continuous Short beeps 3 to 5 seconds and stops – Motherboard or Processor Problem
    Most of the the time this kind beep is a motherboard error if the motherboard is 4 years old and above. Time for replacement. You may consider resetting the processor it also helps sometime.

    If the computer is full of dust, clean it and see if works.

The above beep codes are the most common I’ve encounter and I didn’t rely on the motherboard beep codes manual. So you have to check first the motherboard manufacturer equivalent beep code error.