Sony Vaio VPCEA4DGX Core i3 no lights on the screen
Action taken:
Change LCD screen same problem
Change LVDS cable same problem
Torubleshooting:
Apply Voltage tracing in LVDS connector
19V in pin38,39,40 in LVDS connector drop to 3v if LCD screen attached
if no LCD attached 19v in pin38,39,40 are present....
Solution: Changed F16 or make jumper
