Memory incompatible

[Angela19721]

The system detected that unsupported DDR3 memory type is installed.  Please power off the system and remove the unsupported DDR3 memory to avoid system instability and potential data.

Memory incompatible (2E3)

 POWER BUTTON -Power off

ENTER - Continue Startup

For more information , pleasevisit: www.hp.com/go/techcenter/startup

[Paul_Tikkanen · Accepted solution]

If you are getting that error, there is DDR3 1.5V memory installed and your notebook uses DDR3L 1.35V memory.

[Angela19721]

 Thank you very much.  Where can I find a compatible for my laptop?  Do you know where I can find instruction taking the old one out and putting in a new one?

[Paul_Tikkanen]

You're very welcome.

In order to answer your question, I would need to know the full model number or product number of your notebook.

How to Find Your HP Laptop Model Number (Video) | HP® Tech Takes

[Angela19721]

[Personal Information Removed] Serial Number 

F4L93AWHABA Product Number 

[Angela19721]

[Personal Information Removed] Serial Number 

F4L93AW#ABA Product Number 

It was a symbol instead of H for product number

[Paul_Tikkanen]

You have a HP ProBook 640 G1 notebook PC.

It appears that the notebook originally came with a 4 GB memory chip and it shows that the original memory chip was the correct voltage (PC3L-12800).

HP PartSurfer

So, if you bought the notebook used someone installed the wrong memory in it.

Below is the link to the service manual where you can find the memory removal and replacement procedure.

HP ProBook 640 G1 Notebook PCHP ProBook 645 G1 Notebook PCHP ProBook 650 G1 Notebook PCHP ProBook 65...

The notebook can support 2 x 8 GB of DDR3L-1600 memory.

This would be a compatible 8 GB memory chip for your notebook.

Amazon.com: Crucial RAM 8GB DDR3 1600 MHz CL11 Laptop Memory CT102464BF160B : Everything Else

After you open up the notebook and figure out what memory is installed, if they are only 4 GB memory chips, you may want to replace them with two of the above chips and max out the memory to 16 GB.