I bought one of these monitors new years ago (AUD $880!! My most expensive monitor of all time), very reliable apart from a "grey screen" fault that comes up from time to time and is fixed by switching the monitor on and off repeatedly. It could apparently be fixed/returned to Radius (and I did read of a repair somewhere online once), but I was happy enough with the monitor so didn't bother, although the faulty did get worse over time.

Due to the monitor's age, I'd suspect caps first.

JB