As most of us have already noticed, there was a strong noise coming
from the SM2 LeCroy HV power supply, indicating some broken fan(s).
Today, I've changed 2 of them (there is a total of 6, 3 on the front
and 3 on the back) and now it is quiet, as it should be. The 2 broken
ones were almost stuck.
A presto,
Ioannis