FIXED: after a very long investigation of what was causing the display failure and checking most components were working perfectly (might check the backlight capacitors, not my issue tho, the voltages were good on mine), also checked for a connector problem on the board (as Alexis mentioned) however it was clean and no external things in there, so I decided to check the display LDVS flex cable had some damage on the first pin from the right (that pin is the one in charge of the backlight voltage). Changed the flex and problem solved, I wish I could show the video used as guide to check (was great) but can't find it anymore.