Hawk 5M Power Cabinet OverTemp

[HurcoUser]

Hi
As the title suggests I have a Hawk 5M on which the error message Power Cabinet Overtemp is now highlighted on the screen.(see pic) I have investigated the cabinet and it does not seem to be overheating but I have noticed that the yellow LED on the the Canbus card is always on ( along with the red watchdog LED). I can't see any external sensor in the cabinet but there might be.
Is it normal for this Overtemp LED to be permanently on?
Regards
George

[HurcoUser]

I' ll answer this one myself :-)
The two LEDs should not be on.
In a previous Hurco thread for a different mill it was suggested to clean the ISA edge connectors and guess what , it worked!
George