Installing additional memory

[Snoopy2]

My battery has been sitting at 68% for months and wasn't charging so I bought a new one. Since I had to get the battery number, I also ordered another 8G of memory taking the number off the memory chip in my machine. I installed the battery and it appears to be charging. I installed the memory chip but it came back with a memory management error so I went out to HP.COM and found the maintenance guide and saw that I was supposed to upgrade the Bios, which I did. I re-installed the chip, rebooted, checked the system, it said I had 16G of memory but it then came back with the same memory management error and went off to restart, which didn't happen. The 5 dots on the bottom of the screen kept circling and never rebooted. I removed the chip and the machine is running okay.

What did I do wrong? Did I miss something?

[Huffer]

You need to give us the model number of the computer but if it came with a single 8 gig module and an open slot it should take 16 gigs. The new module could be bad. I would run memtest86 on the machine which is a free download to make a bootable memory testing disk. 

[Huffer]

Or just tap F2 as you power up to get into diagnostics and test memory with that. 

[Snoopy2]

The model number is 15t-ae100 - HP ENVY notebook