Working today on getting the PSL back up.

The measured laser output power is down by about 20 W from what it was before the power outage this weekend.
When the PMC locks on the TEM_01 mode, the transmitted power is about 10 W, only about 2 W lower than what it is when it locks on the TEM_00 mode.
Before adjusting the alignment into the PMC, I would like to understand what has changed.  Maybe it is related to the power drop from the high-power oscillator (HPO).

The power meters that measure the reflected and transmitted PMC power were giving bogus readings on the PMC MEDM screen (negative power).  Removing the power connector at the meter head and reconnecting corrected this.  The LED on the PMC locking diode is very dim, much dimmer than the ISS PDs, for instance.  It may have been this way all along.

The first time the system was restarted, it shut down after about 30 minutes.   The cause of this shut down is now known.  The chillers seem to have plenty of water and the flow rates are well above the nominal thresholds.

Left the system to warm up overnight.  Watchdogs are set on both the front end (FE) and HPO.
We will trend all the relevant diagnostic channels in the morning (diode currents, powers, temperatures, etc.) to see if we can find what might have changed with the FE or HPO.