Question Cpu connection pad indent

[northernsky]

Hi,

My new build PC build wont post. Do you think this indent on a CPU connection pad could be the cause?

https://www.dropbox.com/s/9xu495iyj5qgt4y/CPU_Concact_Pad_Dent_2.jpg?dl=0

Thanks

 

[alceryes]

As long as the pin still makes good contact there it won't be an issue.

 

[SamirD]

I think that could easily be an issue. If the cpu came that way, exchange it.

 

[drea.drechsler]

Hi,

My new build PC build wont post. Do you think this indent on a CPU connection pad could be the cause?

https://www.dropbox.com/s/9xu495iyj5qgt4y/CPU_Concact_Pad_Dent_2.jpg?dl=0

Thanks

It looks like a pogo-pin in a bed-of-nails test fixture got stuck and indented the contact. You could RMA or return the CPU, it's certainly a manufacturing defect and within your rights. But if it works you could also just use it.

 

[SamirD]

It looks like a pogo-pin in a bed-of-nails test fixture got stuck and indented the contact. You could RMA or return the CPU, it's certainly a manufacturing defect and within your rights. But if it works you could also just use it.

Interesting. What could cause a pogo-pin like that to get stuck like that? And does this happen often?

 

[drea.drechsler]

Interesting. What could cause a pogo-pin like that to get stuck like that? And does this happen often?

There can be literally thousands of pins in any one bed-of-nails and that fixture, in production, might be actuated literally thousands of times in a day. I have memories of test techs banging (tappy-tap-tap) on the side of the fixture or toggling the actuation multiple times to get reliable contact for a test to commence. Often times replacing several pins to get it to work for the production batch but usually they get stuck in a retracted position, not extended which could cause a defect like that. And usually, probe marks aren't cause for rejection but that does happen to be a critical interface surface.

But we were also a low-rate, ultra-hi-reliability manufacturing facility for aerospace. Fixture designs might be somewhat different for hi-rate, just kick it out the door and let RMA pay for it when the customer catches the defect.

 

[SamirD]

There can be literally thousands of pins in any one bed-of-nails and that fixture, in production, might be actuated literally thousands of times in a day. I have memories of test techs banging (tappy-tap-tap) on the side of the fixture or toggling the actuation multiple times to get reliable contact for a test to commence. Often times replacing several pins to get it to work for the production batch but usually they get stuck in a retracted position, not extended which could cause a defect like that. And usually, probe marks aren't cause for rejection but that does happen to be a critical interface surface.

But we were also a low-rate, ultra-hi-reliability manufacturing facility for aerospace. Fixture designs might be somewhat different for hi-rate, just kick it out the door and let RMA pay for it when the customer catches the defect.

Thank you very much for the insight. Was there not a better pogopin design available that could prevent these problems? Obviously, moving parts have a limited lifespan with that high of a duty cycle, but it sounds like it was a problem that you faced regularly.