Having problems with your Dell OptiPlex 170L PC Desktop ?

Beeping when i turn on and black screen

\015 Dell computer when power is turned on beeps 3 times and nothing happens\015

Answers :

IT is either one of three things. \015\012\015\012
  1. keyboard missing; check it's plugged in.
  2. \015\012
  3. graphics card; check that it has not been dislodged and is seated properly.
  4. \015\012
  5. memory. Are the memory cards properly seated?

describe the beeps a little bit more. For example, do you hear 3 long or short beeps? or do you hear 2 beeps, then a pause, then one more short beep?

Follow this link: http://www.pchell.com/hardware/beepcodes.shtml
to determine what symptoms your desktop computer is having when going through P.O.S.T. (Power On Self Test)

When your computer boots up, there should be an option to enter BIOS. "Press F1 to enter BIOS" or "press delete to enter bios"..different systems it varies what to press to enter into the bios. After you do enter, there will be an error log at the bottom or depending on the bios name, in other places listed under system log.
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