At around 10:30am local, Betsy and I went to the CER mezzanine to turn on the high voltage for the TCS PZTs. X turned on without issue, but when I flipped the switch for the Y supply the light would flicker and there was a buzzing/humming coming from the unit. The voltage and amps read out as the same as on the X supply, but I didn't feel comfortable leaving it. I powered the unit down and came back with Fil who found the fan motor not turning. He will work on a replacement, until then the TCSY laser will be lasing but not stable.

Filed FRS13716