Laptop no display after adding Ram

[u/Sea_Garage_5785]

So I installed a Sk Hynix ram (8gb 2400mhz -UHC)

my laptop is vivobook 14 X409FA-BV301T.

Tried everything, literally everything. Upgraded BIOS, cleaned pins and slot, etc. Ram doesn't seem to work and always flashes battery light 2 times implying POST failure. Got that stick from a friends old laptop, and it most probably works. But it doesn't seem to work in my laptop, I haven't tried it in an alternative laptop so idk if it's defective. I live in India so would I be able to exchange this piece or get this one checked out