My macbook pro wont recognize the 8gb of RAM i put

[Ilazb]

Hi everybody
I have a macbook pro, it has 2 gb. Of RAM, i just bought 8 gb from crucial, i changed it, but it only recognized 4 gb. And in about this mac says that only one memory slot is working, so i switched both cards, and is the same slot the one thats not working, the bank 0.
Does anyone ibis what can i do?
Thanks

 

[GGJstudios]

It would help if you tell us which model you have, as not all models recognize the same amount of RAM.

 

[simsaladimbamba]

What exact Mac do you have, as there have been many iterations of MBPs since 2006?
Identify your Mac and Mac OS X version

Btw, do you still have warranty?

"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006​

 

[Hansr]

Most likely it doesn't support 8GB only the last two revisions do.

What MBP do you have?

 

[Ilazb]

It would help if you tell us which model you have, as not all models recognize the same amount of RAM.

im pretty sure my macbook pro should recognize it, is the mid 2009, 13,3". 2.26ghz

thanks!

 

[Ilazb]

What exact Mac do you have, as there have been many iterations of MBPs since 2006?
Identify your Mac and Mac OS X version

Btw, do you still have warranty?

"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006​

I dont have warranty, i bought it on december, 2009.
thanks!

 

[GGJstudios]

im pretty sure my macbook pro should recognize it, is the mid 2009, 13,3". 2.26ghz

Make sure the RAM sticks are properly seated. If they are, you may have a faulty RAM stick.

 

[MagicBoy]

Should work, might need an EFI firmware update tho.

What are the model identifier, boot rom and SMC version numbers listed in System Profiler?

 

[Ilazb]

Make sure the RAM sticks are properly seated. If they are, you may have a faulty RAM stick.

I opened my macbook pro, then i put both RAM sticks
I turned the laptop on, and it only recognized one, I went to system profiler, and it said that there was only a RAM on the BANK 1/DIMM0:, so i thought one RAM wasnt working, i opened my laptop again and switched both RAM sticks, and is the same slot the one thats not working, the BANK 0/DIMM0:. And then i opened it again and make sure both were seated properly. But now i know that both sticks are ok, because is the same slot thats not recognizing any RAM.
what can i do?

 

[MagicBoy]

Put the Apple RAM back in and see if that works in the non-detecting slot.

 

[GGJstudios]

But now i know that both sticks are ok, because is the same slot thats not recognizing any RAM.
what can i do?

Put the original RAM sticks in and see if it recognizes both of those.

 

[Ilazb]

Should work, might need an EFI firmware update tho.

What are the model identifier, boot rom and SMC version numbers listed in System Profiler?

Model Name: MacBook Pro
Model Identifier: MacBookPro5,5
Boot ROM Version: MBP55.00AC.B03
SMC Version (system): 1.47f2

Should work right?
Thanks!

 

[Ilazb]

Put the Apple RAM back in and see if that works in the non-detecting slot.

Ok, I'll try and see. thanks

 

[MagicBoy]

Should work right?
Thanks!

Yep, that's up to date.

 

[Ilazb]

Yep, that's up to date.

so what could be wrong? the slot??
i just had it working.
well, i didnt really checked if both slots were working before changing the RAM, so may be thats it. What can I do if the slot if failing??

thanks a lot

 

[Ilazb]

Put the Apple RAM back in and see if that works in the non-detecting slot.

Ok, I did. I opened it again and I tried in diferent positions. One slot, and always the same one is not working. What can I do?

 

[MagicBoy]

Check it for physical damage, clean out any dust and muck with compressed air. If the slot remains faulty then it's new logic board time.