Bad display on Dell Latitude c600 - need sugestion from a video recording

[Green/Electric]

here's the video:

I need advice/sugestion to know what part might be bad, Is the inverter or the flex cable or what else?
I was opening and closing the lid like a normal laptop would but without having the screws for the hinges so i believe the flex cable pulled in some wrongfuly way. I did reinsert the flex cable but this time nothing got fixed. I have 2 spare flex cables and 2 inverters for this specific laptop model latitude c600.

 

[Lightium]

You need to be careful with the flex cable. Some tiny speck of anything can cause mishaps. check the socket of the cable was well.

 

[danadak]

Flex cables, and their connectors just problems waiting to happen.

I always clean connector with contact cleaner, then blow it out with low pressure air.

And wipe off cable contact end, again gentle operative word.

I have found high pitch connectors like this with contacts soldered down on
PCB with cracks, poor soldering.

Both display end and LapTop PCB end are suspects.

Some issue revolve around the GPU/Display Controller, quite often a ball grid array.
Soldering issues. Some folks have had success flooding chip with flux and using a
heat gun reflowing the part on the PCB. Youtube has some videos on this.

Not a fan of LapTops, they are not built for high reliability in mind. In fact I think
they are junk when they leave the factory. I have had so many where hinges and
plastic fails its depressing.

While you are at it clean fan, if LapTop old, and you can replace thermal grease on CPU.
Be extra careful not to get grease into socket pin contact area. Thin application all
you need, no gobs like a cow meadow muffin sized squish out all over on reassemble.

This dude quite good at repair with simple tools -

Good luck.