No Screen Light and fan loud after Hdd upgrade to SSD

Hello Help,

Computer:

21.5" mid 2011 IMac 2428

So upgraded:

-500GB HD to 2TB Samsung 860 Evo SSD

-OWC thermal data sensor for new SSD

-16 to 32 on Ram

-Copied over original HD info into SSD prior to install

Issue:

Fired up Mac, hear chime, black screen and loud fan.

I read to shine a light at a slant into black screen to look for if you can see any lettering or words as if it was on, but I didnt see anything.

I do have an extra monitor and extra copy of original hd info on external drive, as that was mentioned on a forum. I also have a xtra Sata lll cable, which was purchased before I bought OWC thermal data cable(which used instead)

?? I'm at a loss what to do?

New to Mac upgrading.

Thanks