Game king bill Val issues

[Nepa Coin Op]

I have a GK here giving me bil val issues, initially it was giving meters disconnect errors, that ended up being the back plane, the rough sorting all of that out I/Os were swapped and played with, I now have it to the point it boots runs and goes through the initial setup. I end up with bil Val error and options verify which is no big deal that will go away when the door is closed. I tested the Val in a different igt and it is dead so I got one from spin, wba13, installed it with 0024 software and it’s still dead in the machine, is there an IO that communicates with the bill Val ?? This is a bit frustrating, I thought for sure it would be slip the new transport in and be good to go.

Any helps appreciated

Thanks guys !!

[Stayouttadabunker]

Is the new one from Spin dead in the other cabinet too?
You're playing with Netplex stuff...can't do any swapping with the power ON.
That's a no-no.

[Nepa Coin Op]

Is the new one from Spin dead in the other cabinet too?
You're playing with Netplex stuff...can't do any swapping with the power ON.
That's a no-no.

I’ve determined it’s a bad head I now have it running, I only got the transport from them, I have 3 heads here but all seem to have issues, 1 renders the unit dead with no comm the others reject all bills, I am running the correct sw in them, at this point I either need a good head or to fix these. What usually fails in the heads ?? Msg sensor? Optics ?? Caps ?? If anyone has a good head I’ll buy it. I just wanna get this thing out of here and back to it’s owner

[Stayouttadabunker]

We're dealing with pretty old crap Nepa....lol
They're way beyond their lifetime expectancies.
If you've ever taken these things apart, the boards are like circuit boards in cellphones...impossible to repair.