First get a DMM and check for incoming +18VDC feature lamp power at 1J4. Since you lost them all this is most likely the problem. Check the big capacitor in the backbox that is to filter the lamp power. Make sure none of those wires have broken off, as well as the bridge rectifier wires. If you have DC lamp power at 1J4 then we can investigate further.

Lamp ground is the black wires of 1J5. Try again. If you still don't get it, go back and check at the capacitor. Also make sure your fuse is good, didn;t pop out or break during the move. At the fuse is AC before the bridge rectifier so you will measure that differently.

wirew (resized).png

w9 (resized).png

You are welcome. You just said AC voltage at caps, how about DC? I'm assuming this is probably no, but please verify. I'm leaning toward this bridge is probably failed based on what you said already.
It would be best to disconnect all four terminals to test the bridge. This way you will not get any interferrence from other devices.
On each set of terminals take a reading in both directions, for a total of 8 readings ( 2 reading on each diode ). The diodes will read infinite in one direction & zero (near zero) in the other direction if they are good.

SsTwJ (resized).png

jsFcp (resized).jpg

diode check (resized).png

Couple of options:

Preheat with heat gun on low carefully, then high temp soldering iron with a large tip. Can help to add solder.
Another is to use two irons,
Another option would be just to clip the connectors off and rebuild with new connectors. This is the option I would use in most cases, because it can be a pain to get the female spades on the new bridge with solder in them.