Quoted from zene10:

I’m out of town and cannot look at my board.
“J7” does not make sense. Is this the J127 connector?
Regardless, that connector needs to be replaced.
Here’s a good thread for WW GI issues:
https://pinside.com/pinball/forum/topic/wh2o-lower-gi-issue#post-4409837

Quoted from zene10:

Apologies. I was thinking of white water. The connector will need to be replaced.
I’m on an iPhone so looking at the schematics are difficult.
Take the fuses out of their holders and check with a multimeter.
If all are good, you can check the wires directly. You’ll need to remove them from the connector and CAREFULLY touch each wire to the corresponding pin on the board header. (With Power on)
If the corresponding GI lights come on , only the connector needs to be replaced. I’d also recommend replacing the board header.

Quoted from jmountjoy111:

Honestly I’m not sure I’ve ever had a system 11 that didn’t need that portion of the interconnect board redone or had already had it done. A lot of the time the traces on the back are damaged as well from someone’s previously poor work. I would imagine all of your gi problems are on that board and it’s connectors. The plug to the left of the one in question (j9) is the power to your lower gi but I would also look at the power input (j6) as well. It’s typically fried in my experience

Quoted from northerndude:

If you do have schematics, use a multimeter to look for voltage, takes away guessing if this or that takes away lighting, also, ohm out all of your fuses to make sure they are all good.