i say that the inverter is ok, because the backlight works just fine if i dont connect the signal connector from the panel board to the screen motherboard. the backlight will remain on until a few minutes when it goes to sleep.
if i connect the signal connector to the lcd panel, the backlight will only be on for 3 seconds.
Yes, if i connect a source (VGA or HDMI) there will be picture displaying properly and will remain when the backlight goes off, i am able to see it if i use an external light source such as a flashlight. if i turn the screen off and back on, it the backlight will turn on again for 3 seconds and go instantly off leaving the picture on the dark.
even without a source connected then if turn on the monitor ON, with the signal wire to the lcd panel, the brand logo will apear which is a pink screen with the brand, and then small box that says no signal will display and then the backlight goes off leaving the picture in the dark.