MBP (Mid 2009) does not read memory from BANK 1

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Level 1

0 points

MBP (Mid 2009) does not read memory from BANK 1

It seems I am having a problem similar to some other people, yet I don't see an explicit answer to the question.

Below is what shows from my system report. However, I have another 4 GB RAM of the same kind in BANK 1. I have swapped both sticks of RAM multiple times to check that they both in fact work.... unfortunately, BANK 1 never reads the RAM.. I have tried memtest and other similar processes I have seen in the forums, but all of those only check the RAM being read, not whether or not there is something wrong with the memory slot itself. I have seen a few posts that lead me to believe it is one of two things: 1. the memory slot itself is bad and I have to replace the logic board yadda yadda or 2. the memory slot was somehow disabled from successive upgrades of the operating system.

ECC: Disabled

BANK 0/DIMM0:

Size: 4 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x0198

Part Number: 0x393930353432382D3030352E4130324C4620

Serial Number: 0x6108D8BB

BANK 1/DIMM0:

Size: Empty

Type: Empty

Speed: Empty

Status: Empty

Manufacturer: Empty

Part Number: Empty

Serial Number: Empty

MacBook Pro, OS X Mavericks (10.9), Mid 2009

Posted on Nov 6, 2013 8:14 PM

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Answer 1

sanjampet

Level 5

7,988 points

Nov 6, 2013 8:26 PM in response to ccjswish

Bad connection somewhere.

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Answer 2

leroydouglas

Level 10

200,754 points

Nov 6, 2013 8:31 PM in response to ccjswish

Not much you can do if the bank is bad on the logic board.

Genius reservation http://www.apple.com/retail/geniusbar/

on-line https://getsupport.apple.com/GetproductgroupList.action

check warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do

http://www.welovemacs.com/ (parts and repair work)

http://www.pbparts.com (parts and repair work)

http://www.dttservice.com (parts and repair work)

http://www.powerbookresq.com (parts and repair work)

http://www.tekserve.com (parts and repair work)

http://www.powerbookmedic.com (parts, repair work and instructional videos)

http://www.ifixit.com (parts and excellent, illustrated online take-apart instructions)

MacBook Pro (15-inch Mid 2012), OS X Mavericks (10.9), i7 500GB 16GB RAM iPhone5 iOS7.0.3

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Answer 3

iveney

Level 1

0 points

Jan 5, 2014 5:32 AM in response to ccjswish

I have a similar situation as you. If I leave only one memory to Bank 1 (the slot that is closer to logic board), it can be read successfully. If I put both, only bank 0 can be read (the one that is closer to the back cover).

I am finding tools to try the "loose the screws" method described here:

https://discussions.apple.com/thread/4263981?start=30&tstart=0

Meanwhile, you could also try to see if that works.

Cheers.

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Answer 4

AaronS7

Level 1

5 points

May 14, 2014 10:53 PM in response to ccjswish

I had the exact same issue. One of the memory slots not reading cards. Thanks to iveney, loosening the 4 screws around the slots worked. I dont know how, but it did. I just gave all the screws alittle more than a half turn to one full turn (loose) and it seriously solved the problem. I almost took my Macbook Pro (17" early 2009) into the apple store and saved me money to have them fix it. If anyone else out there is having this same problem, try this first before anything. Thank you for this!!

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