Wow! Many thanks to you Algirdas
I caught the barga. oh maybe?
Disconnecting the bubble card, caused the appearance of this display on control panel of monitor:
SBP4 - E1.03
Memory Test ok. ! 0000
2037 No bubble memory cards ERROR
(yeah yeah display at last still waiting to boot)
CPU rack now has got green lights Power and RUN both on ON state
So its bubble memory. Can there be any other cause?
Still there are no LED's on from SDU