It can be the display cable or the connection bewteen the interconnect board and the daughter board.
You can try the daughter board + interconnect board from you PB165 on that PB145 and see what it gives.
If this works, then you at least now it's not the display cable.
Leaving only the daughter board and interconnect board. A faulty daughter board is rare, problems with the interconnect board are more common, especially with the cable to the daughter board.
However, it's known that the LCD of all Powerbook 100 series have leaking capacitors. I have already replaced them in all my LCD's and it solves a lot of problems. It's something that has to be done anyway.
After recapping the LCD, you will get a stable display, no more fiddling with the contrast slider to compensate for over- and under contrast.
You can try the daughter board + interconnect board from you PB165 on that PB145 and see what it gives.
If this works, then you at least now it's not the display cable.
Leaving only the daughter board and interconnect board. A faulty daughter board is rare, problems with the interconnect board are more common, especially with the cable to the daughter board.
However, it's known that the LCD of all Powerbook 100 series have leaking capacitors. I have already replaced them in all my LCD's and it solves a lot of problems. It's something that has to be done anyway.
After recapping the LCD, you will get a stable display, no more fiddling with the contrast slider to compensate for over- and under contrast.