Resposta para "How to determine what is defect if the system doesn't post?"Alexis: I tried replacing the power supply with no luck. A friend of mine has a G5 iMac with the same symptoms, 3 of 4 diagnostic LEDs lit and for some reason he needed to replace the logic board. So, now I'm deciding between Video Card, Power Supply or the recycling program. Fortunately I do not have an urgent need for this machine. -Steve
Resposta para "How to determine what is defect if the system doesn't post?"OK, I went through these steps. Three LEDs lit, external monitor works, but screen completely black. Found a deal on a used screen, swapped it out. Power up the Mac, the screen lit up long enough to show the apple on a grey background then died, now same symptoms as before. Did I just kill another screen? What next, logic board, power supply or inverter? Should the logic board detect the panel even if the inverter and backlight isn't working? Thanks, Steve L.