Adding RAM to HP Omni All in One

[JWT57]

I have a similar issue as Zephyrah. I am attempting to add 4GB RAM to my HP Omni All in One 120-1134. I purchased  HP 691740-001 4GB, 1600 MHz, PC3L-12800 DDR3L DIMM memory module. After I installed it into the available slot and powered back up, the screen remained black and  I could do nothing. I had to remove it to get back to normal operations. Incompatible RAM? [Disregard, I have now seen other answers that referenced a poor handbook entry calling for 200-pin vs. 204 pin.  I also believe I must be compatible with 800Mhz RAM rather than 1600Mhz.] 

[Echo_Lake]

@JWT57
Thank you for posting on the HP Support Community.

After reading your post, I did go through the Product specifications of your product and found that you have  4 GB DDR3-1333 installed on the PC.

See the below configuration:

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.