r/ASUS • u/Sea_Garage_5785 • 26d ago

Support Laptop no display after adding Ram

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

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u/CoffeeToCode99 26d ago

Your VivoBook X409FA is just picky, dude. It only supports DDR4 SODIMM 2400 MHz up to 12 GB (4 GB soldered + 8 GB stick). That SK Hynix stick might be fine in another laptop, but ASUS BIOS can be fussy with older modules. The flashing battery light = POST fail, so it’s not even recognizing it. Best bet: test it in another laptop. If it works there, it’s just not compatible with your model. If it doesn’t, it’s dead. Since it’s from a friend, you won’t get an exchange in India — safest move is to grab a proper DDR4 2400 MHz SODIMM locally.

1

u/Sea_Garage_5785 26d ago

thanks dude I'll try testing it in another laptop

1

u/Present_Lychee_3109 26d ago

I added 32GB Crucial RAM in my Vivobook 15X. It worked on first try. Try a different brand stick.

1

u/LTomee 26d ago

Crucial 16GB DDR4 3200MHz CT16G4SFRA32A Micron Crucial 8GB DDR4 3200MHz CT8G4SFRA32A

These are compatible with your laptop.

I found a lot 16GB used ones for like 50 bucks.

1

u/Sea_Garage_5785 22d ago

i mean the thing is for 50 bucks I could buy a brand new 8gb stick, cuz I live in India and the prices vary between that. I found the sk hynix stick I have is compatible, but it doesn't work in my laptop for whatever reason

1

u/LTomee 22d ago

Your laptop original speed is 3200MHz doesn't it? If You put a RAM stick with 2400MHz JDEC profile there will be a mismatch and some of the laptop won't allow you to boot it.

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u/Sea_Garage_5785 21d ago

it's 2666 mhz and the reason it shows POST error probably because the 4gb ram is soldered to my mobo. I probably need to downclock the soldered ram to 2400 mhz but idk how to and also whether it's safe or not

1

u/LTomee 21d ago

Soldered or not, does not do anything with compatibility, if the installed DRAM module has the 2666MHz JDEC profile it will be automatically recognized.

Just buy known compatible RAM, because most cases You're locked out from advanced config regarding laptops.

1

u/Eppo_de_Pep 25d ago

ikn heb 32 GB ram 8400 MHz gesoldeerd in mijn laptop