bank1

Hi Everyone,

 

This is my first time posting and I am having troubles with my mid 2009 macbook pro (with 4gb memory) waking up from sleep. I resetted my PRAM and SMC but it didn't work. I narrowed it down to the memory because I noticed it would say I had 2GB memory instead of 4GB. I took the memory out and put it back in and my macbook pro woke up from sleep perfectly fine.

 

The problem arises when I restart my mac. It would freeze and then the screen would go black and the front light would be on without any blinking or flickering thus causing me to hard shutdown.

 

Afterwards, I checked my Memory at about this mac and found that it would have 4gb or 2gb and it would change intermittently. I found out it was my bank1 that was going from empty to existing. The strange thing now about my bank 1 is the following information I see.

BANK 0/DIMM0:

 

  Size:          2 GB

  Type:          DDR3

  Speed:          1067 MHz

  Status:          OK

  Manufacturer:          0x80CE

  Part Number:          0x4D34373142353637334548312D4346382020

  Serial Number:          0x85B3D2E1

 

BANK 1/DIMM0:

 

  Size:          2 GB

  Type:          DDR3

  Speed:          1067 MHz

  Status:          OK

  Manufacturer:          0x0000

  Part Number:          0x000000000000000000000000000000000000

  Serial Number:          0x00000000

 

As you can see, the original manufacturer and part number and serial numbers are overwritten with 0s. How do I fix this problem? I also made sure that I didn't see any pins when I put the memory sticks in there.

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