Z490-A Bent Pin problem

wmllama154c02df

New member
Joined
Oct 15, 2021
Messages
2
I was trying to fix something that wasn't broken - I thought a pin was bent when in reality it wasn't lit properly, so I "fixed" it and bent some more pins. Now, I straightened out most of the pins in the picture, but I am unable to book with memory installed in dimm sockets A1 and A2. I guess I didn't quite fix the bent pins that didn't need fixing. Which of the pins could cause this problem? The computer will post with memory installed on B1 or B2 (and B1 and B2), but error out when memory is installed on A1 and A2. Any hints are appreciated.
 

Attachments

Richj44

New member
Joined
Sep 6, 2021
Messages
19
I was trying to fix something that wasn't broken - I thought a pin was bent when in reality it wasn't lit properly, so I "fixed" it and bent some more pins. Now, I straightened out most of the pins in the picture, but I am unable to book with memory installed in dimm sockets A1 and A2. I guess I didn't quite fix the bent pins that didn't need fixing. Which of the pins could cause this problem? The computer will post with memory installed on B1 or B2 (and B1 and B2), but error out when memory is installed on A1 and A2. Any hints are appreciated.
I believe you're supposed to install into A2 and B2 first, have you tried that combination?
 

wmllama154c02df

New member
Joined
Oct 15, 2021
Messages
2
Thanks for the reply. The problem is that the board will not post if a dimm is installed on A1 or A2. It will post with memory on B1 or B2 (single channel mode). I gather this problem usually occurs when a pin is bent and contact is not made properly.
 

citay

Pro
SERGEANT
Joined
Oct 12, 2016
Messages
3,646
Your observation is correct, the memory controller is inside the CPU, it's connected from the CPU contact pads to the socket pins to the PCB traces to the contacts in the RAM slots. So if some pins are bent and make bad or no contact, some of the RAM slot contacts are not connected. The pins that have to do with the RAM should be mostly on the right side of the CPU socket, since that's the most direct line to the RAM slots. You might have no choice but to bend them all straight again. Bent socket pins can easily break, so you don't want to grab them and force them back into position. You just want to gently prod/push them in the right direction, never bend them back and forth.
 

Richj44

New member
Joined
Sep 6, 2021
Messages
19
Thanks for the reply. The problem is that the board will not post if a dimm is installed on A1 or A2. It will post with memory on B1 or B2 (single channel mode). I gather this problem usually occurs when a pin is bent and contact is not made properly.
Your initial post stated it would not post with RAM installed on A1 *and* A2, not *or* A2, so that's what I was going by. Obviously if it won't post with a single dimm in A2 there is a problem. Sorry for misunderstanding the issue, and good luck straightening those pins.
 
Top