MEANING OF THE BEEP SOUNDS IN A Pc.
Know what each beep sound of your computer means when turning ON your computer.

Those beeps are your BIOS "telling" you that something is wrong with your computer.

• One Beep
  -DRAM refresh failure
  
  This may be due to :
  - Bad memory chips
  - A bad DMA Chip
  - Bad memory addressing chips on the motherboard
• Two Beeps 
  - Parity error or Parity Circuit failure
  - Your memory may not be seated properly on the mother board.
  >Unplug and plug it properly
• Three Beeps 
  -Bad memory or bad mother board
• Four beeps
  -Timer failure in the RAM.
• Five Beeps
  -CPU chip may be dead

• Six Beeps 
  -Keyboard controller may have failed
• Seven beeps
  -CPU is dead. Retry the connections and test.
  >Replace the whole motherboard.
• Eight Beeps 
  -Video card is missing or Bad.
• Nine Beeps 
  -Damaged ROM BIOS.
  >BIOS chip has to be replaced if it persists.
• Ten Beeps
  -CMOS shutdown.
  >Replace CMOS memory and associated chips.
• Eleven Beeps
  -Cache memory test has failed.
  >To enable cache memory try CTRL+ALT+SHIFT++(i.e Hit Plus(+) Sign).
• One long Beep and Three short Beeps
  -Memory failure
• One long Beep and Eight short Beeps 
  -Video card failure.
  >Try to install video card in another slot.
• 
  
• No Beeps
  >Check Power supply
  >Check mother board connections
  >Remove all cards except video card and check for system power up
  >Insert all cards one at a time and check their operation.
  >If system hangs on the installation of a particular card, then it is the cause for the problem and replace it with another of that type and check