There are two "sets" of flashers in FTBH - one set is controlled by the A3 driver board in the backbox and one set is controlled by the aux driver board on the back of the insert. Each set receives its power through a .33 ohm 5w resistor. The set controlled by the A3 board has its resistor located under the playfield. You can see it in this excellent photo that Chris Hibler posted on IPDB under the subway on the lower left:

http://ipdb.org/showpic.pl?id=3591&picno=52461&zoom=1

Or even better on this one he posted on Pinwiki:

http://pinwiki.com/wiki/index.php?title=File:System3FlashLampResistor.jpg

The set controlled by the aux driver board has it's resistor located on the back of the insert board just below the aux driver board:

http://ipdb.org/showpic.pl?id=3591&picno=52459&zoom=1

Early AN Sys3 games went to resistor boards for the flashers but later DMD games went back to a single resistor for groups of flashers. There were problems with the resistor boards and the resistors would unsolder themselves.

You can see which flashers are controlled by which board in this shot. The yellow are controlled by the A3 board, indicated by "SOL", and the red by the aux driver board, indicated by "DRV":

Big Hurt flashers

You mentioned you went through the game and its squeaky clean. Did you install LEDs? Assuming you tested all the MOSFETs and they all tested the same and there were no signs of damage then the only conclusion is that the two flashers that you say are out that are controlled by the A3 board (left and right card holder) are either bad, or bad sockets or bad wiring or the flashers are not connected on one or both ends to the harness or you missed something in your test of the A3 board. You know which MOSFET it is on the A3 board by adding 1 to the solenoid number. The left flasher is SOL17 which means its controlled by Q18 on the driver board. The other one is Q19.

Unless you have a ticket dispenser or a mechanical coin meter on the machine then I wouldn't expect SOL26 to do anything in test.

Your autoplunger not working could be a bad LED. Here's how to check it out:

https://pinside.com/pinball/forum/topic/gottlieb-freddy-issues#post-2026317

Some of the flashers controlled by the aux driver board are paired with the playfield and backbox flashers but as you correctly surmised,

DRV6 and DRV7 control only flashers on the playfield per the diagram above. All the other ones have both a flasher on the playfield and a flasher in the backbox. The backbox flasher map is as follows:

Big Hurt backbox flashers

It's not uncommon for the MOSFETs on the aux driver board to blow. In fact you have to make sure there are no BUZ72s on the board or it will wind up like this:

http://www.homepin.com/MA1722.html

(He took the burnt board photos from my Pinside post).

Replace ALL BUZ72s you find with IRL530/IRL540. If you don't, your board will look like the one in the photos.

Todd, If you need more info PM me.

viperrwk