'blankscreen' or 'turn off monitor'
I am not familiar with these.
If you have anything reproduceable, then please take your time and show us how.
/Gibman
I have peviously posted logs and simple description in this thread 'twice' without response about this matter and yet I get more response when I ask for a simple option to turn it (Heartbeat) off, which would be an aid to testing as it is now impossible to test without Heartbeat to see if the same error occurs.