No Backlight MacBook A1181

Have an A1181 at the moment, no backlight. Tried a test inverter and inverter cable, but when trying to boot, the LCD cable sparked and burned away some of the insulation (see picture).

Haven't repaired many of these models (under 10, don't get many of these now) so I don't have a lot of experience with this particular one, and don't know exactly what could cause this.

I have got an LCD cable somewhere which I will try, but I was wondering if a bad inverter could cause an issue like this (don't want the same thing to happen with the other LCD cable) or if I should look out for something on the board? On top of that, the keyboard cable connector fell apart when disconnecting, so I have ordered one of them as well...