PS/2 Port Problem

Discussion in 'General Electronics Chat' started by Peter_England, Jul 4, 2013.

  1. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    I am facing a PS/2 port problem on Intel DG31PR Motherboard how to trace the circuit problem ? please give some useful information .
     
  2. nerdegutta

    Moderator

    Dec 15, 2009
    2,519
    786
    Please give some more information:

    1) What kind of problems?

    2) What have you done?

    3) What do you think is causing the problems?

    :)
     
  3. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    Thanks nerdegutta I have removed decoupling caps for Data line and Clock line but no luck actually num-lock toggles but no working of keyboard means not getting in bios settings or any keyboard activity i have checked with two keyboards so no keyboard fault itself . thanks .
     
  4. nerdegutta

    Moderator

    Dec 15, 2009
    2,519
    786
    Are you sure the keyboards work? Tried on another computer? Did this suddenly happen, or were you fiddling around? Have you tried hard resetting the motherboard?
     
  5. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    yes i changed bios also and the keyboard is working fine in other systems . thanks.
     
  6. nerdegutta

    Moderator

    Dec 15, 2009
    2,519
    786
    Changed bios...? To one exactly the same...?
     
  7. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    yes from another working motherboard of Same type . thanks.
     
  8. nerdegutta

    Moderator

    Dec 15, 2009
    2,519
    786
    What happens when you turn it on? Does the motherboard go through the POST?
     
  9. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    yes it goes through post .
     
  10. nerdegutta

    Moderator

    Dec 15, 2009
    2,519
    786
    I'm out of ideas, right now. I might come back...:)
     
  11. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    Ok thanks. No problem.
     
  12. sheldons

    Well-Known Member

    Oct 26, 2011
    616
    101
    have you checked the data lines are changing when a key is pressed .....you obviously have a fault where the keyboard control lines for whatever reason are not being read-is there a signal from the board to the keyboard key scan wise....
     
    Peter_England likes this.
  13. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    Thanks Sheldons , please tell how to check that signal pls tell .
     
  14. €Hunter

    New Member

    Jul 6, 2013
    33
    3
    Not sevicable. Highly specialized. Trade secrets and the right gear the only hope.
     
  15. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    Is that need an Oscilloscope ?? or what ? Please give some idea .Thanks.
     
  16. €Hunter

    New Member

    Jul 6, 2013
    33
    3
    Tell me that you're an ex employee of the company that made it.
     
  17. €Hunter

    New Member

    Jul 6, 2013
    33
    3
    Few 1,000 flight hrs of real time experience repairing motherboards?
    Go buy a lottery ticket you stand a better chance.
     
  18. Peter_England

    Thread Starter Member

    Jun 29, 2013
    73
    1
    No i am not an ex employee of any one of the companies you think. thanks. pls help me i am stuck at Intel DG31PR motherboard that i need to repair and give back to client. the rest motherboard is working good . please help.
     
  19. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    Why not just use a USB keyboard?
     
  20. €Hunter

    New Member

    Jul 6, 2013
    33
    3
    Hope you find some help. I mean there is a slight chance that I am wrong. Perhaps an expert or two can shed some light.
     
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