Aligned the output of the 70W power amplifier into the pre-modecleaner. Tried locking the pre-modecleaner but the mode matching used to make the output of the power amplifier mimic the high power oscillator was not good enough. The SMA to BNC adapters for the RF summing box were replaced. It was noticed that tightening these eliminated the RF signal altogether. I have turned off both the front end laser and the power amplifier.