Hi, My old MDD (2 GB RAM running Tiger with two monitors) is starting up normally. But since yesterday my Mac shows a blinking power button on the monitor only (the 17-inch Apple display which is my secondary monitor - my main display is a Samsung HD digital TV). The blinking cycle is two times short one time longer and then 5 seconds pause. When the blinking started the Apple display has become somewhat darker on top, it gets lighter gradually down to the bottom. Do I have to get another 17-inch Apple display? Or change my graphics card? Has anybody had a similar experience? What does it mean? Thanks for all comments. Jörg from the Netherlands. Update: I just noticed that the brightness of the Apple display with the blinking button is normal for a split second when I move the mouse during power saving mode when both displays are black. Then the 17-inch display gets dark again on top. So the display seems to be OK. Maybe there is not enough energy coming from the ADC port when both displays are active?