I disconnected the setup for the arm cavity TF measurement. I opened the scitation switch on the ISS medm screen. I reconnected the OMC ISS EXC cable to the breakout box on the floor.
The photodiode on the Y end is stilll connected.
Also the RFAm (whish is not disbaled anymore) still has a 50% beam splitter before it.
I'm also running the Align Full IFO script.
I removed the beam splitter and the PDA 255.
the beam path to the RFAM photodiode is clear again.