help with my single stage

[CHRIS_666]

Hello everyone, well I'd like to help me with some problems I've had with my long single stage. The problem is that when I first started using it arrived without problems at temperatures around -55 or -50 ° C without problem, but after 2 years or so, suddenly began to fade after reaching -20 where I delivered a message " PC Power not found Shutting down in 5, 4, 3 ... ". Sometimes after being trying several times I have gotten it to work after that message, but rarely turns out that way. I wonder if they know the problem that can be associated with this and how I can fix. Thank you very much in advance.

 

regards