Help big problem no screen on 3k

Hello I bought a 3k without screen but with the vga output, all works good

I have a S 3OOO so I want to take off the screen and put it in the 3k, I also change the backlight
When I tur up the mpc the screen is bright blue but there is nothing on it and the contrast knob seems to not work

Does someone have the solution??
thanks

peace

please provide some more details! have you already installed the screen from the s3k in your mpc? Is it sitting in the original housing from the mpc3k screen? I know this problems from changing the backlight. If the lcd isn´t thight enough towards the backlight, there may be nothing to see on the screen. Try thigtenning it, but be careful not to brake the screen!

Hi yes I've already put the S3k screen in the mpc. It's the same that the old one I take off.
I know the screen works because I test on the S3K before making the changement

Even without backlight there is nithing on the screen

Have any clue?