The screen would squeal and flash its power LED, showing no other signs of life. The two 1000µF/25V capacitors (C263 and its mate) had failed. They sit on the 13V rail. They were successfully replaced by two used 1500µF/16V Nichicon KZG. All other capacitors tested OK, and were not replaced.
The screen also suffers from a loud buzzing noise when the brightness is turned down. I have not been able to identify the fault, but I believe it to be a fault in the lower CCFL of the panel itself.
Worth noting is that the screen had only logged a run-time of 3000 hours in the service menu before the power supply failed . . .