well, that is a good idea.
if the deck is known good, then you should get something out of it.
set the preset vol to low, if you are worried about it being too loud at startup
nothing from the ttable, could be from a bad stylus and nothing else.
nothing from fm, could be the missing aerial -turn the fm and afc switches to "off" and try again.
but, based on your location fm strength could simply be an issue. user: lazerwave on ebay (no affiliation) sells antennas...
good luck and keep us posted!
++++edit++++
should have asked... i assume you plugged the new din plugs into "1" and that the spk switch on the front is set correctly?
you may want to also try moving them to "2" and throwing the switch accordingly...
oh, and have you tried headphones?
++++edit++++