PowerBook 2400c unstable display

[Kamomr]

I got two 2400c from Yahoo Auction last year - one dead and one working.

Sadly, working one got early stage of vinegar syndrome, so I've swapped display from dead 2400c which hasn't suffering syndrome.

But after I swapped display, backlit comes on but no pictures on the screen.
At first, I thought display is dead, but when I press left side of display hard enough, display comes on.

So I disassebmled display housing and found if I press display connector hard, picture comes on.
It looks like display connector on LCD site have some physical connection issues, but I cannot make it stable.
I've put cardboard to push connectors, but it still unstable when I touch screen.

Does anyone have this problem and knows best way to fix this?

 

[3lectr1cPPC]

check for cracked solder joints on the ribbon cable connector?

 

[Kamomr]

check for cracked solder joints on the ribbon cable connector?

Oh, that might be reasonable cause of flickering.
Then it might be on LCD's controller board side?

 

[3lectr1cPPC]

Not sure. You said that it works if you “press the display connector hard” so wherever that it.