Can ram damage motherboard?

Thanks. I put exactly the same spec ram. 1.2v ddr4 2133 MHz, just 8gb. The only other posibility I see is the built in audio card, that gives a damaged output when the default drivers are in use. Also my power cable has a little tear on it, about 1.5mm. could any of these issues be the cause of a ruined motherboard, only 3 months after it was replaced? Can a memtest ensure that the ram is fine and not damaging anything?

Thanks so much for taking the time to assist me. I appreciate it very much!

It all started with me sending my Lenovo 510S-13 to the lab in order to fix an issue with the headphone jack. I replaced the upgraded 8GB ram card to the stock 4GB ram card so they won't claim that I damaged the headphone jack by opening the laptop . I probably did something wrong, and for the first time in my life the computer didn't boot afterwards. Later I learned it was a matter of current flactuation, but the lab probably didn't know it, and were kind enough to replace the motherboard anyway under warranty. I got the laptop back, installed the 8GB card and again the laptop would not boot. So I did some digging and found out that the solution for this current flactuation is to remove the battery and hold the power key for some time. Easy enough, it worked. So I enjoyed my laptop for almost 3 months when I got these colored stripes that ended in a black display.
So they replaced the motherboard again under warranty, but now I'm worried. Maybe the 8GB ram card (new 8gb ddr4 kingston) is what fried my motherboard out of the blue, and not the bad installation of a technician? What are your thoughts. I need to use the laptop for Android Studio, but if it's a risk I'll keep the 4GB ram (I know it probably isn't because the ram worked fine before the first motherboard swap and after that, but I did change the ram cards back and forth three times).
As I see it, my laptop has 3 issues that may have caused the problem, and I'd like to know which is probably responsible for my motherboard dying 3 months after replacement:
1. Headphone jack supplying noisy output while using the official audio drivers. Problem gone when using Windows' own audio driver. First colored stripes and restart appeared when using the headphones, with Windows' audio driver.
2. Could it be a faulty ram card? If so, will a memtest / windows memory diagnostic confirm it?
3. I have a very small tear on my power supply cord (maybe 1.5 mm).

Which is most likely to have ruined a new motherboard after less than 3 months, or was it just a bad installation by the technician? I am running Windows 7 (the audio problem I decribed above does not appear in windows 10, even with lenovo's drivers). The laptop is only 14 months old and I don't want to part from it just yet. The one year warranty has passed, but I still got about 3 months warranty on the motherboard if it fails again, which I'm really really trying to avoid.

Thanks again. My laptop is the older skylake edition (i3 6100U). it came without an os, but has full windows 7 support and drivers. my stock ram is a 4gb 2133mhz 1.2v samsung and the new one is a 8gb 2133mhz 1.2 kingston.

This is the ram I bought, with the specific specs I mentioned above: kvr21s15s8/8
This are the specs from notebookcheck:
https://www.notebookcheck.net/fileadmin/Notebooks/Lenovo/Ideapad_510S-13ISK/cpuz5.PNG

Couldn't it be connected to the other problems I mentioned before?
Is it wise to connect the 8GB ram and start a memtest?

Thanks. So I understand it's not enough to know the specs I specified. Which info do I need?

Kingston says KCP421SS8/8 which is not available in my country.
But the one I have also follows the same specs. Anyway, could it be the reason my motherboard fry or are the others more likely?
The 8gb kingston ram worked flawlessly for many months before the motherboard got fried. Will a memtest make us any wiser?

What about the other info I mentioned?
What do you recommend I do?

The Fuse on the adapter or the laptop?
What about the audio card issue I mentioned?

From what I mentioned, what is the most probable cause for my motherboard dying 3 months after replacement?

No, it's not on the outlet side, but at the laptop side. Could it be the reason?
It charged correctly even after the damage.
Why not use windows 10? because it is still too buggy for me. And much slower than 7.

This is my experience.. Any idea about my original query, what caused my MB to failed after less than 3 months?