I bought a Micron 8gb DDR4 2400mhz stick for a refurbished Lenovo Yoga 530 14arr, and I had some issues installing it. I was already taking a gamble with mixing it with the included ramaxel 8gb 2133mhz so I was prepared to run into the display problems, but I wanted to do some troubleshooting before just giving up and tried a few different things, first being switching the slots which didn't work, the second being ensuring each stick worked individually, which they did. I tried one more thing, which was check them individually using the second slot, and the display remained black on both tries with the individual sticks despite the system being on. So even though the mixing issue isn't totally out of the question, there's definitely something off about the second slot. I was wondering if there are any other steps I should take or if there's nothing to be done. Most other articles I read about the slot being the issue had people still able to boot with the RAM in the faulty slot simply not registering, but for me regardless of what configuration I use the slot in, the laptop does not start. I read about some DIMM slots being disabled by default in the BIOS, but mine (InsydeH20) doesn't seem to have the option to re-enable it if that's the case.