Gray screen HELP!!

As of right now, i wont have exact details but i hope someone can provide information as of what to do before hand.

So, a while back, i upgraded my girlfriends macbook pro, i believe 2013.
with a samsung 840 pro ssd. i think it was the pro.. i am pretty certain.
But definitely a samsung.

As of recently, she did the most recent update and now it wont load properly.

First it would load extremely slow with the load bar
And now it just loads a grey screen. Nothing else.

i am not familiar with mac or apple. I also dont recall how ive installed any of the things.

But the computer works great, till it was updated.


Could this issue be caused by the third party ssd?
Does it have anything to do with Trim?
What can i do so far to get it out of gray screen?
I dont believe ive ever enabled trim?
how do i check?
Could it be an update issue?


I have been trying to read up on trim and i dont really understand what it is in terms of grey screens or if they have any relations.

I also came across enabling or disabling trim.. causes security issues?

I am really lost and i hope some can ellaborate..

I will provide more information when I actually go check out the laptop

Thanks

 

is there not a macbook 2013? i think thats what she has. i am pretty certain.

i will need to inspect further what exactly it is, but because there is a gray screen i dont think anything can be accessed.

What is PRAM AND SMC?

we have tried entering safemode, but that did nothing

what is Radeongate?

i can only find information, but not really understand, but.. does trim or anything cause just a blank gray screen? or anything in relations to that?
-how do i check if trim is enabled or disabled?

 

Non of the options above worked, havent tried recovery.

If i cannot check if trim is enabled or disabled how do i tell if that is not an issue?
generally, how do you enable or disable it to begin with?
for recovery, how does that exactly work?
- do i need a disk? (we dont have one)
- is it from a restore point? ( didnt ever set one..to my knowledge, unless it does it automatically)
- does " reinstalling" not work the same as windows? where it formats first?
it is really important to retain all saved files in the hdd
- how do you tell if ssd is fried?

Thanks for all your help! you are the only one who is actually helping i really appreciate it.

 

tried everything you have suggested, but cant access even recovery mode.

does compatibility issues with a third party ssd cause this?

would this also be considered a dead ssd?

thanks!

 

Thanks for the help! it turned out to be exactly that..

stupid hard drive cable =l

apple fixed it for 60 bucks though =/

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you have been the best of help.

i really appreciate the help you have given.

wish i could do more

thank you!