Krell KSA 200S Owners


I recently got a Krell KSA 200s  and have been trying to hook it up.

The bias and everything  seems fine but the blue led for Power seems to fluctuate.
It will stay on and the go off and come back on again.
As time passes the duration of it staying on increases but the time it stays off is stable and same as previous.
I listened carefully and sonically nothing changes while the led changes, could not have find why this is happening.
Did anyone have a similar experience previously?
128x128kunalraiker