Is this normal for the screen cable?

Hi @rsiopa,

The missing #24 pin may be just because it wasn't necessary since it is not being used. There seems to be two distinct cables connected i.e. red/yellow/black wires which look like some sort of power supply and a video cable (sheathed, shielded cable)

Try shining a flashlight at an angle close to the laptop's screen and check if you can detect any images on the screen.

They will be very faint if they are there so trying this in a darkened room may help.

If you can see images then there's a backlight problem with the screen.

Either a faulty backlight power circuit (fuse? - check for a voltage <20V?) on pins 22 & 23 of the video cable connector, be careful that you don't short out the pins to the next pin with the meter test probe - see image below.) a faulty cable or cable connection (either end, motherboard or screen) or perhaps a faulty backlight circuit in the display.

Here's an image of the LCD connector wiring from a Toshiba L655D that may help

(click on image)