Daniel tried to rebooted Beckhoff PC remotely, but it didn't come back so he rebooted it in MSR.

After that things came back mostly, there were two major exceptions:

1. JAC WFS whitening/dewhitening mismatch.

WFS whitening was off for two stages we use but the anti-whitening was on. WFS was at first turned on by the guardian when we tried to lock JAC and it totally misaligned it. We had to manually locked JAC, noticed that the alignment was off, cleared WFS history both in WFS feedback filters as well as JM1 lock filters, fixed the whitening/dewhitening mismatch by pressing "ON" buttons for two whitening stages, and after that it started working OK.

2. JAC got cooler, temperature servo overheats at first, and we're only getting 15 minutes lock stretches for now.

It took about 20 minutes for the Beckhoff to come back because the first reboot attempt didn't work (1st attachment). Thermistor 1 temperature dropped by about 0.05 degC as the temperature servo wasn't doing anything (2nd attachment, it looks like a sudden change but it's not, it's just that the Beckhoff EPICS numbers were frozen before that). Temperature servo started heating it hard as soon as it came back, overshot and tried to reduce heating, but it's still heating harder than it used to.  Because of that, JAC lock PZT voltage quickly goes to zero after relocking. We'll have to wait.