Car will not start

Electrical problem 4 cyl Front Wheel Drive Manual 200000 miles

Hello, I'm working on a 1990 Toyota Corolla as a favor for a friend - it has well over 200,000 miles on it - they've had a new battery installed, new alternator and now a new starter and still won't start. The starter relay fuse tested good, all fusible links tested good. Ignition key was broken off in ignition so I installed new ignition - only thing I can think of that hasn't been changed is the battery cable from battery + to starter or the clutch switch. Any suggestions?

Engine does not crank; when you turn the key from lock to ACC everything comes on as normal; turning the key all the way to the start position everything just goes dead, no clicking noises, nothing.

Could it be the ignition starter switch?

The connections at the battery have been verified as good; have already replaced the starter relay in fuse box under hood, what is the second relay that could be causing the problem?
I will test

voltage at starter and solenoid as you suggested. (Fyi. Not sure if I told you already but the battery, alternator, ign. Switch and starter are all brand new and I have had them tested to be sure they are good). Where is the clutch safety switch located, under dash, at tranny or engine compartment? Is this the same as a neutral safety switch on an automatic?

Thanks,
CD