Got myself an other (non functional) Portable and transplanted the screen.
 
WORKS!  b:  
 
Thanks you all for your help and advise. I now have a working 5120. Hard disk is working and floppy drive too.
 
I will have to transplant the inner part of the screen because of a ugly sticker on the screen.....I will look into this and come back to the forum if I need help.