Does PSC or NSC read to ground?
Have you tried to plug in from the door board or selector in case the plug in the COP is bad?
Check the Transorbs from PSC to NSC on the terminal strip. They should read like a forward biased diode in both directions or you can just disconnect them.
A DMC will run on Inspect without a CLC.
And your Watchdog LED on the CLC is on right?