[Jenne, Keita]

After the computers were brought back up, the optics, and especially the input PZT on the PSL table, were brought back to old saved values for their sliders.  Even though the PMC was locked, with the PZT off so far, the IMC-PWR_IN_OUT PD was reporting 0.0W injected to the vacuum. 

I restored optics and especially the PZT to slider values from yesterday during a lock, and the IMC-PWR_IN_OUT read a sensible value of 1.8W.  However, we were still not seeing any image on IMC REFL despite MC1 definitely being back in its position. I went and used the input shutter at it's midway position to attempt to see if we were getting beam injected to the vacuum, and we definitely were not. 

Keita and I looked at the cameras that Cheryl has recently installed on the PSL table, and trended the centroid values for the last day or so.  In particular, IO Gige 2's image was different from where Keita remembered, so we trended the centroid values for that camera.  We moved the PZT sliders until the centroid values for IO Gige 2 were back to where they had been, and we started seeing light on IMC REFL camera.  Hooray for the IO path pointing reference cameras! 

After this, IMC recovery was easy and normal, just moving the optics a teeny bit more until the IMC locked on the 00 mode, and letting the guardian and WFS take over.  I did increase the WFS master gain up to 0.2 (5x the nominal value of 0.04), and then put it back after we were closer to converged.