Re: It's the sun
@PAKennedy
Heard of a similar story concerning a mainframe (this was back in the 60-70's) that would crash fairly regularly during summer in the afternoon.
At first it was thought the cause was a defective aircon installation but checks and sensors said everything was okay.
Turned out that when the sun did its daily stroll across the sky, the computer room had this one particular window which would, in the afternoon, let the sun shine directly on the glass lid of the disk unit housing the system pack.