|If possible, try a different monitor and see if it acts the same way. If a different monitor works OK then the LG must be bad. Is it still under warranty?|
I notice in your original posting you said the monitor 'blinks'. I think I assumed that meant 'blinks off'. But if it means it's flickering or something like that then it's very likely the problem is with the monitor or video card.
Caramel--the devil's chocolate.