This situation started a few months ago and is a mystery to me.

The monitor was working fine, then one day the power LED turned off and the screen would not wake up. The monitor was replugged and came on as normal, however after about 10 minutes it would go black like it was off. The power indicator would stay on, however, it wouldn't wake up and pressing the monitors power button did nothing. It remained consistently like this.

The monitor is connected to a PowerMac G5, via an ADC to DVI brick. Replugging the brick from the wall fixes the issue, and replugging the monitor from the brick but leaving the brick powered on also fixes the issue. This suggests to me that the issue is in the monitor not the brick.

With that in mind and following some online suggestions, I replaced the LCD control board in the monitor with another (likely second hand) one. Now the situation is exactly the same as before except the screen will stay on for about an hour before going black; an improvement for sure but not good enough..

So the question is! Could it actually be the brick at fault? The power inverter in the monitor? Or did I replace one faulty control board board with another faulty one?

Id love to hear any suggestions, because at this point, I'm not sure there is much more I can do the save this lovely monitor!