Insignia 19KK44 Service Manual page 60

（4）No picture but has back-light after power-on
No picture but has back-light after power-on
Check if LVDS line is loose?
No Yes
Check if voltage of X501-1# is 5V ? Plug in LVDS line well
No Yes
Check out N601 Check if voltage of X602-2# is above 0.8V ?
No Yes
Check out peripheral circuits of PWM Check out main chip