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Richard
Richard, Computer Specialist
Category: Computer
Satisfied Customers: 32055
Experience:  Over 20 years of consulting to the IT industry
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I am trying to upgrade the RAM in my Lenovo Z50-75, I went

Customer Question

Hi my name is***** am trying to upgrade the RAM in my Lenovo Z50-75, I went to Best Buy made sure I bought compatible RAM but after the install the screen is black when I power it on. I would greatly appreciate any help, thank you.
Submitted: 10 months ago.
Category: Computer
Expert:  Richard replied 10 months ago.

Hi there AJ and welcome

If you remove the ram, does the Lenovo then start up?

Customer: replied 10 months ago.
when I remove the Ram and put old ram back in it starts fine. I have looked online seems like it's some what common issue with Lenovo. But couldn't find the fix.
Expert:  Richard replied 10 months ago.

What size is the Ram and the exact specifications of it?

Customer: replied 10 months ago.
It's PNY DDR3 2 8gb cards dual channel 1600mhz (pc3-12800) vas latency 11 voltage 1.35 compatible with 1600 1333 and 1066 mhz
Expert:  Richard replied 10 months ago.

ok, and this is in addition to the memory in the Laptop already correct?

Customer: replied 10 months ago.
Correct the laptop is a Lenovo Z50-75 it has 8gb in it I wanted to take that out and replace it with the 2x8gb cards
Expert:  Richard replied 10 months ago.

ok, so you only have a total of 16GB right now correct? As if you exceed 16GB it will not work.

Customer: replied 10 months ago.
No no I have 8gb is laptop that's what it came with 2x4gb cards I bought 2x8gb cards wanted to take out the Ram that it came with and replace it with the new ram it would have a total of 16gb ,which in user manual it says laptop should support 16gb
Expert:  Richard replied 10 months ago.

ok... sorry AJ, but please review my last question as you said No to it.

You only have a total now of 16GB correct?

Customer: replied 10 months ago.
Oh sorry yes a total of 16gb
Expert:  Richard replied 10 months ago.

thanks AJ, needed to confirm.

Put one of the 8GB in and a 4GB

Does it then start?

Customer: replied 10 months ago.
its compatible with laptop can't figure out why screen stays black when it out the Ram cards in
Customer: replied 10 months ago.
Ok I will do that now
Expert:  Richard replied 10 months ago.

thanks

Customer: replied 10 months ago.
Hmmm odd it's starts right up and screen come on fine that's with one 4gb card and one 8gb card
Expert:  Richard replied 10 months ago.

ok, now try the other 8GB please and see if it starts with that and the 4GB

Customer: replied 10 months ago.
Ok
Expert:  Richard replied 10 months ago.

thanks

Customer: replied 10 months ago.
Ok so I swapped the 8gb cards like I said and it starts up with the 4gb and the other 8gb
Expert:  Richard replied 10 months ago.

which version of windows do you have?

Customer: replied 10 months ago.
I have Windows 10
Expert:  Richard replied 10 months ago.

ok, with the 4+8 ram in it, follow these instructions and tell me how much Ram its showing

http://www.techddictive.com/2015/08/windows-10-check-ram-system-specs.html

Customer: replied 10 months ago.
Ok I'm on it :)
Expert:  Richard replied 10 months ago.

thanks

Customer: replied 10 months ago.
It says 12gb of ram
Expert:  Richard replied 10 months ago.

ok, put the 2 8;s in again, still wont start?

Customer: replied 10 months ago.
Ok I put the two 8s in and same result I can hear the power come on can and all is working but screen stays black
Expert:  Richard replied 10 months ago.

just put one 8gb in, does it start?

Customer: replied 10 months ago.
Let me try
Expert:  Richard replied 10 months ago.

thanks

Customer: replied 10 months ago.
odd same thing screen black
Expert:  Richard replied 10 months ago.

ok, and now try the other please

Customer: replied 10 months ago.
Same black screen
Expert:  Richard replied 10 months ago.

ok, to me it points to faulty RAM when they are used at the same time. Its not exceeding the value and we know they work with the 4GB but not by themselves or together AJ. A fault with one or both of the modules is the only cause left for this and I would return it to be replaced.

Customer: replied 10 months ago.
Ok thank u so much for all your help I will make sure and write a good review
Expert:  Richard replied 10 months ago.

Your most welcome AJ

If you would like any additional information or assistance, please do not hesitate to let me know.

And please take a second to rate my service by clicking one of the stars at the top of the screen then submit.

Thank you