SYSTEM Yasnac J300
After Power ON system check : Pass 1, Pass 2 long breake and Displayed message: ACGC UNREADY Hand shake 1.
System Halted and all LED on JCP10 Panel start blinking very fast

What is the most possible reason of this failure. How to check it?
Monitor controller is built on the JANCD-JSP11 and I/O contains two PCB JANCD-FC861.
I'll be grateful for any help in above problem