I have checked all the cables of my equipment, and them look OK.
Last night I had the same problem again, when the PHD2 looses the guiding star, is unable to start guiding again.
What I have seen is that the SGP-PHD communication fails always, when my sequence starts it opens the PHD perfectly, but as soon as the SGP ask the PHD to calibrate, the PHD doesn't do the "Connect all" step. If I go to SGP guiding setup and Choose my PHD profile and click on "Connect All" it works, but it seems that when the sequence starts the connect command doest work at all.
Thee SGP goes to recovery mode, and if I manually do "Connect all" on phd2, and then click on try again on SGP, then the PHD calibration process starts and the sequence goes well until the guiding start gets lost, and then SGP is unable to continue or communicate with PHD2 again.
Here is my last night log:
https://onedrive.live.com/?cid=0a0a7875ab57a95a&id=A0A7875AB57A95A%213351