Got notification somewhere around the CARM_ON_TR to REDUCE_CARM_OFFSET transition: NO IR in arms!!! Tried Sheila's alog suggestion of setting the ISC_LOCK guardian to manual mode and reselecting PREP_TR_CARM but it did not seem to work. Tried going back and forth between CARM_ON_TR and REDUCE_CARM_OFFSET and got brief spikes in TR_X_NORM and TR_Y_NORM but they did not last. Lost lock in middle of this. The ISC_LOCK guardian was still in manual mode when it lost lock and the guardian appeared to go haywire when it did. I think it may have been quickly flashing between all of the states. I quickly set it back to auto mode but something was still wrong. I tried different things including reloading the guardian but that ended up with a user error message. At the same time the DAQ was being rebooted and the nds servers went away. However only the SYS_DIAG guardian seemed to have an error related to this that cleared when it came back. The issue with the ISC_LOCK guardian user error message was still there. It seems to have been because when I reloaded the guardian it loaded code that Sheila was in the middle of editing. She commented something out and it was able to reload and move on. Not certain what if any of the problems leading up to this were related to nds restarts.

I got a SYS_DIAG notification that there was an issue with the NPRO noise eater. I think this may have been there since the PSL work. Sheila, Cheryl and I reset it. After that the ISS went into oscillation. Jason was able to fix it.

I have left the IFO in DC_READOUT while Sheila and Jenne investigate why an increase in power is breaking the lock.

Lessons learned:
When the ALS_COMM guardian notifies you to find IR by hand: Go to the ALS Overview, click on the lower left 80 MHZ VCO to open the H1:ALS-C_COMM_VCO medm screen and move the Set Off (Hz) slider to bring back the LSC-TR_X_NORM signal. This can usually be done by 3 clicks to the left.
When the ALS DIFF guardian notifies you to find IR by hand: Got to the LSC Overview and adjust the very small slider labeled ALS_DIFF at the bottom of this medm screen to bring back the LSC-TR_Y_NORM signal.
Dave says losing the nds servers *can* affect locking the IFO because the guardian connects to them.