Per WP12651 we investigated and replaced the IO Chassis supply for H1SEI23 which supports seismic on HAM 2 & 3.  This supply is located in Mezanine rack C3, location U2 Right Side, provides +24V, and measured ~3.5A draw.  The fan was chirping and grinding which suggests a failing fan bearing.

Old Supply = S1202002 old fan worn out bearing to be refurbished.
New Supply = S1201919 new fan with ball bearing.

F. Clara
M. Pirello