I have a very lovely and presently not working Cinema Display 24 inches. Here is what it is doing. When connected to my Mac it shows up as a valid screen in the Monitors System preference and if I am not mirroring displays my mouse and windows can be placed in this 'space'. However there is not any on LED power light nor does the USB/Firewire port function. What is odd, is this is intermittent. It used to be dark for a bit but mostly on. Now it is dark 99% of the time, and occassionaly comes to life. When it comes to life, it is bright, and clear. So the lamp is more than likely OK. The power supply has been tested with another unit and it is not power supply (external) related. I have thought it could be the inverter board which is a part I can buy cheaply and repair. However I was told my LCD is more symptomatic of the LCD panel being bad. Apple wants a $450 fee to diagnose that would be applied towards repairs, but at that cost, it is almost worth getting the new LED model. I would prefer to fix it in a more economical manner. Does anyone know of what could be causing my set of symptoms and/or a reliable LCD repair source preferably in the NY/NJ region? I would prefer to have some idea of a diagnosis before I go and buy invetertor boards and A/D boards. However I can replace the power supply, inverter and A/D board for under $300 so that is abetter option than Apple's. However if the LCD panel is in fact dead, then it is a lost cause. New panels are very hard to find. Any help is appreciated.