I think my 23" ACD's AC adaptor is broken as it does not power the ACD. There are a few replacement AC adaptors on the market. Can you tell me which one I need to buy? The main ones I found are: A1096 661-3760 Power Adapter for Apple 20" Cinema Display DVI 65W A1097 Power Adapter for Apple 23" Cinema HD Display DVI 90W I was not able to power the 23" ACD with the one for a 20" ACD (45W). So, the replacement I need should be at least a 65W unit.