PANASONIC SC-PT560 ONLY POWER ON LED IS GLOWING, NOT POWERING ON

DEAR ALL.
I am trying to switch on my Panasonic SC-PT560 after a long time (town shifting).
But, only RED light is glowing when powered on.System is not starting on.
Is there any hard reset button combination ?
It was absolutely fine, when packed.

What could be the reason ?