I am facing a PS/2 port problem on Intel DG31PR Motherboard how to trace the circuit problem ? please give some useful information .

 

please give some useful information .

Please give some more information:

1) What kind of problems?

2) What have you done?

3) What do you think is causing the problems?

 

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 .

 

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?

 

yes i changed bios also and the keyboard is working fine in other systems . thanks.

 

Changed bios...? To one exactly the same...?

 

yes from another working motherboard of Same type . thanks.

 

What happens when you turn it on? Does the motherboard go through the POST?

 

yes it goes through post .

 

I'm out of ideas, right now. I might come back...

 

Ok thanks. No problem.

 

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....

 

Thanks Sheldons , please tell how to check that signal pls tell .

 

Not sevicable. Highly specialized. Trade secrets and the right gear the only hope.

 

Is that need an Oscilloscope ?? or what ? Please give some idea .Thanks.

 

Is that need an Oscilloscope ?? or what ? Please give some idea .Thanks.

Tell me that you're an ex employee of the company that made it.

 

Few 1,000 flight hrs of real time experience repairing motherboards?
Go buy a lottery ticket you stand a better chance.

 

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.

 

Why not just use a USB keyboard?

 

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.